Nothing too complex or in-depth that the real knowers of the game are talking about. Just a few simple things:
1) Have morale stats tell you whether morale is falling or rising (v. useful)
2) More variety/greater number of citizen/character names (it's a bit embarrassing to have "Sarah Karim" and then "Sarah Karim 1") - this should be easy to do and improves immersion
3) Option of whether to garrison transported legions on invaded planets or keep them in the transports (for immediate use)
4) Would be v. nice to know how many turns it will be before you can declare war on a civ again, shown on the map and/or in the diplo screen (this is already done for non-trading periods)
Thanks for listening Stardock! 