One thing that I really dislike about SEIV

[Dr Strangelove]

Yes, it would be nice if the picture of a system when Last visited would persist. Even more cool would be if the date of the Last visit would be displayed.

Something I dislike is the way the AI seems to have a problem realizing the danger inherent in blackholes. I've had enemies seperated from me by a black hole, but with a perfectly usable but longer alternate route, but the AI will throw away fleet after fleet trying to attack through the black hole system. I put some ships on the other side of a Warp point leading into the system, then every turn I peek through the warp point and watch the enemy fleet slowly getting flushed down the black hole.