I too am in the 'Civ IV is the best' camp.
I tried Civ V and was very disappointed. However, in playing Civ BE, I am finding it to be a huge improvement over its base version.
PROS
- I really like the explorer unit in this game. Finally it's done correct. For so long, 4x games did not know how to make a useful scout/explorer. Civ BE is the first successful attempt.
- Trade Routes is very well done. As this is very similar to the Civ V system, I would argue that this was well worth porting over.
- The Aliens presence is a welcomed distraction. While I prefer the monsters of FE:LH, the aliens of Civ BE do keep the player occupied and help fill out the map in the early game.
- The Virtue system is amazing. Way better that Civ V's Social Policy system. If there was one thing I wish Civ IV would include, this would be it. Having culture simply expand your cities boundaries is a little dry.
CONS
- Expansion is HEAVILY penalized. This is a major wiff towards the game's success, in my opinion. 4x games centralize around queue production, and if you can't get cities, you don't get queue production. Some of my favorite 4x games played consist of 9-12 cities; not too many and not too few. In Civ IV, 6 cities was attainable by mid game and by end game could get up to 12. Was a lot of fun. However, in Civ BE, I've at most had 3 cities so far. I'd love to build more but two things prevent me from doing so: First, the colonist cost is WAY too high. Second, the overall health indicator results in significant impact if you expand too quickly. (thankfully, I've fixed the first part and reduced colonist production cost to 120. It's WAY better now, but still not perfect with the second problem existing.)
- The load times are so lllllllooooonnnnnggggg.
- Single tile units. The inability to stack units in this game makes it very frustrating to go up against the AI in the congested environment. In my opinion, the creators of this game would have gone a long way if there were tech or virtues available that would allow limited stacking (for example, max 3 units, or something like that). Units become obsolete as a result, and they're only saving grace is that the list of available units is short, so each unit type does receive a fair amount of time to be serviced.
OVERALL
I would give this game a 6/10.
It's different enough from the previous Civ games to capture my attention as I explore the new environment and build the new units and find the new resources, etc. However, once the novelty wears off it really doesn't amount to much of a strategy game, and as a result, will be shelved.