[Q]

I would like an improved AI, e.g. improved AI decision making about locations for attack and colonisation. I see frequently in SE IV colony ships going to the other side of the quadrant while empty planets would be in the same system. And fleets moving one turn in one direction and the next turn coming back again without attacking an undefended enemy colony or ship within reach.
The AI seems an important point for the sales promotion of SE V because I think the majority of the people who bought SE IV play it solo.