Daily Challenge tweak
I realise that this in all probability won't be an idea you havn't had and won't be top of your agenda before launch however:
I think taking inspiraton from the typical 'find the best move/mate in x moves' chess puzzles could add some much needed interest to the daily challenge. Instead of starting at square one and really just being another skirmish against ai start us with 100k debt and a badly laid out colony or in a three way at level 5 when half our shares have been bought. Can you stabilize and win from this position would be more interesting and a better learning prospect than yet another way to play skirmish.
I understand this would require a lot more work to set every day but I'm sure you could farm it out to the community if there was a basic map editor. It would be a lot more involving to finally get your custom scenario chosen or pick up a gauntlet that cubit or zultar had thrown down