I'd like the ability to change the facing of your ships so you can line up your formation in a certain direction instead of having them always face the direction that the ended their movement in. This is INCREDIBLY important defensively as the direction your ships face is the direction they fire in.
When enemies jump in you don't want to have to waste time manuvering your fleet so their targets are within firing arc. This is time when the enemy can get off their special abilities, take shots at some of your ships or even start moving towards some other objective in the system that you won't be able to respond to.
The ships already have manuvering thrusters on them or at least the ability to vector their main thrust. Otherwise none of the ships in the game would be able to change their heading while moving. This should allow them to reorient themselves in place and change their facing as you desire. I don't see any reason why this shouldn't be a feature in this game.