Last night i was replaying HomeWorld 2, it is a dated game, but though the graphics are not as intricate or detailed, the "style" of the game play was interesting. It has been a while since I played, but I really miss the "story mode" of the missions, one arc or action from one map to another. Another thing is the research tree, which is implemented in stages, in a sort of "just in time" fashion, just before you need it. We have research trees in Sins, but I can see the whole tree, and I have a tendency, (I know its my fault) to try to do all my research at once. It would be nice if it was automaticallyl done by the AI in the background, or prompted by the AI. "Do you wish to research Planet Observer Drones at this time?"
"Increased Hull repair research is available, would you like to research it at this time?" that sort of thing.
It is probably just me, or maybe my approach to each game is different, but I can't understand why, if both games approach things the same way. Or perhaps Sins is Tactical, and HomeWorld strategic? Hope I haven't offended anyone, its probably just me, im missing something, but I like the slower, thinking... laying out my positions and following up on background details while the battle is going on, like, making sure I have enough harvestable materials to convert to points for all the ship function costs. Perhaps Sins could incorporate a mode system? Where if I wanted a quick and heavy battle, i go for the tactical, push all detail to the ai and let me concetrate on fighting, or the other slow mode, where lots of details are brought forward to the users control like harvestable materials and followup on research or building of ships or sub-systems for the ships, and yes, the ships need to be bigger, way way bigger, like real you know?
Anyway, I love HomeWorld, but its dated and probably not going to be redone, a shame, because it is really really good. And Sins which is very very good, but which of course is held up against the spotlight of all our favorite games. It is hard for one game to be Star Trek, Star Wars, HomeWorld, Sins and Halo and Doom all in one $49.00 package. But well... it is was... haha.... there would probably be like megatons of marketshare 
New items or ideas? How about a persistent universe? LikeI start playing, and can load maps consecutively? one right after the other without leaving the inside of the game? Stars and wormholes could be used as load points and load screens such as the main load window could be used to transition, or you could use something more appropriate, like a still image of a ship, or planet, or anything really while the new map loads in the background. Inside this persistent universe we could also have additional persistence, meaning inside this multi-map loading game play area, we incorporate a clock and random, or even extrapolated events from the state inside the game, such as, I play until midnight, I'm tired, I leave my fleet at a planet and hit save/exit and go to bed, When I log on the next night after work and dinner, I see that in game 12-15 hours have passed. Several of the outer rim planets that were minimally guarded have been lost to the Vasari, while some of the inside planets have increased fleet numbers from production on those planets continuing, or from coalitions that were automatically done by the ai to join the tec/advent factions on close planets into a cease-fire treaty to battle against the vasari. So what do you think?? Workable? Like EVE online, we could have skill sets or repair functions that take real world time. But the player could be compensated with other things to do while that happens, like having my player character asked if I want to be reassigned to materials mining while my fleet is rebuilt over the next 12 hours? I then get a miner ship, and concentrate on doing mining runs and selling the ore and not seeing or dodging the war ships that are the main fare of the Sins maps. I'm not saying i dont' like Sins, I do, it is great! but i am just saying if i had a dream list, what would i want to put into this game to make it even more "mine" more awesome and more cool for everyone.
In addition, what about a Auto AI? What I mean is where the user puts the game on auto, where fleets build, explore, fight, conquer, lose automatically? Where the user can sit and watch it all unfold like a movie?
What about Online Coalition Wars? Where a mini-perpetual game is in progress, days or weeks? where real people come and go, and when they leave their places are held by NPC fleets, or the map area is surreptiously move away from the vacated players worlds and fleets to other worlds and fleets. The AI could be scaled for this, so when 15 real people are playing the ai is in the background moving the pirates and the diplomacy? But when 10 people log off to go to sleep, the ai steps in and takes over those factions and moves them out to a unobtrusive area, and the war and the ai, and enemy scale is toned down to the 4 or 5 people that remain? In this way it is like one long continuous game joined and unjoined, played and exited, fought and bled and cried over and still kept going, as long as the players want to select continue game in progress from a login when they go online? Is this too far fetched or workable?
In addition, the ai could be used not only as adversary as we are used to having it, but it could also be used as a tutor, to learn the game or to tweak some to the decisions of players (mostly new players i am guessing) but could also be used with advanced tactics and suggestions from prominent players or devs to be used as an advanced tutor for advanced players. Workable?
Ai could keep running records of how many enemy or allies are on map at any one time and where, and decrease or increase them according to the players desire. Lets say I start a game on easy, because im tired and i dont think i will play long, but then i get into it, and the game is getting a little more intense, could i have an in-game area to change the difficulty to moderate or even hard? Or perhaps the ai asks me? "Your opponent is increasing the pressure on 3 of 4 worlds in this sector, do you wish to increase the difficulty level?"
What about Chess styled games? By this what i mean is starting on a rather large map, say 60 plus worlds, but the key here is with a fixed amount of ships, with no more available for the duration of this game on this map. In this way, perhaps captures, instead of kills would be preferrable, or if not, straight kills, where one player (even the cpu in single player games) gets to a point, much like chess, where it is win, lose or draw? Also, having respond to times might force a players hand, if that option was chosen in this chess style screen options?
Also, last and not least ship and weapon editors: It would be nice to design our own ships. Yes, in game that eats up a lot of time, but lets say you spend a week building a perfect fleet, one for each type of ship in sins, and then load them up and play games. At that point there is no in game time lag for the design, it has already been done, either accept the default and get in game real quick, or select to build new fleet and spend however many hours you want on that and then move in game. Also, last thing...
I promise... character editor, or new character portraits. An editor of course would take it off the devs hands, they could simply give a range and let the users play with it. Of course there is the up front dev time to build an editor in the first place. So its a trade off, upfront dev time for editor alot, or cheap with new portraits, but the editor has more running power that the portraits. Two years later users can still be using it and the devs dont have to worry about portraits. Anyway, that is my rather extensive two cents, but I love this game and just want to see it I suppose, more personalized to what I think a perfect game is. That may not actually be possible with any game, but its worth writing posts about anyway 
Take care,
-Teal