A couple of things that I don't think have been mentioned:
--The option at game setup to view all, allied, or none of the treaties of known empires, like it is now for score.
--The ability to make AI's create one (and only one) ship/base within a system with a particular component. Then, AI's might effectively use components that give system-wide abilities. Then Rollo might put the Orbital Mind Control Lasers into DNM.
Otherwise, my biggest requests are movable/resizable windows, wheel-mouse support, the ability to save and reopen simultaneous turns, the ability to sort by planet type in the Planets screen, and restrictive racial techs.
Quikngruvn