[minipol]

I think it's a complicated idea too but it would make things far more realistic. I'm not sure if it would make things more fun.

But what with fleets at the other end of the map? That would be unworkable unless they arrived there through a warppoint from your own system (that you opened with a warp opener for instance)

In such a case, you should be able to set a command for the fleet like: go there, attack this, stay there for x number of time or until mission x is accomplished and then come back.
But this would be very complex si i don't think it's doable in such a manner that it increases the gaming experience but that's just my opinion.