I would like it, if making a fleet, real meant something. Right now, it is only a replacemeet for hotkeys, with focues fire, engagement range and fleet Cohesion. It also addeds a retreat command, and a fleet squadron Mangement button(which with all the small ships, is real nice).
So here what I would do.
A fleet, is a group of ships that have a centralized command system, which allows them to fight as a group, right? So why not make, it so when they are in a fleet, that they have a improved command system.
Improved system
Make it so, when you turn on/off auto cast for any ship, you also turn off auto cast for all other ships, of the same type. This is one of the things, that Sins, has a problem with. You have to select each ship of the same type, and turn off the same abilitie for all those ships in the fleet, which given the number of ships, can lead to a lot of time, focues on micro, instead of fleet control.
So the people, who use hot keys can turn off the auto cast for one of the Serevun Overseer's Reactive Nanite Armor, with out turning off the auto cast, for all the other Secevun Overseer, with in that hot key group. But if that Serven Overseer was in a fleet, then all Serevun Overseer's Reactive Nanite Armor auto cast, would be turned off.
Second, I would add that if I select the fleet, and hit the button for an defensive abilitie(Reactive Nanite Armor) then all ships of with that abilitie would use it at the same time. There would have to be a fleet AI in place, so that they did not just cast it on the same ship. So lets say That I have a fleet, of Serven Overseer and I hit there Reactive Nanite Armor button on the fleet. Each ship will target an different ship, so that there abilitie, comes, to it full effect. This would Radiance Battleship,as there animosity abilitie could then be split between a group of Radiance(which is other reason for a fleet AI).
Offenive ailities is something, that we will have to test. Should hitting the button, make all the ships, of the same type, use that abilitie, on one ship or a group? Should it be all the ship of the same type or the best one for the job?