1. More espionage options, like tech stealing, destroyng buildings etc.
2. Being able to controll space battles! doesn't have to be be superadvanced.
3. Being able to controll planet invasion, some sort of low quality minigame for fun

4. Waaay bigger maps! like 10fold. (for those with super computers)
5. let minor races colonise like .. max 10planets.
6. and idea would be colonising starsystems instead of planets while implementing humongus maps

gets those ugly "class 0" planets out the way too.
7. more mining!
8. option to have super super slow tech rating. i mean like 15 times as long or more, "epic games"

9. get the AI to use their brains and build better ships, disband their small ships and get som damn firepower! they always go fast for massiva scale building, but never build them. *sigh*
10. better score system for single player, with highscore list... not all of us bother to play on the metaverse.
11. massdriver, beam and missiles........ atleast 5 more! separate some of them.
something along the lines of: plasma weapons, e-m-p weapons (they pwn all), blackhole-tech weapons, timedistortion weapons, massdriver, missiles, laser, "absolut-cold" weapons... you name it!
The belonging defence tech could merge for some, like shields work for plasma and laser and absolutecold... just and idea.
12. permanent wormholes
13. infoscreen in planet that showsthe planets bonus, if u happend to pick one when colonising it.
..that's about it, now stop reading forum posts and get working!