Oh, and forgot this - AIs (which I know they aren't finished, but) right now value researched techs very, very lowly. When I can get 20 of the AIs techs for 6000 credits (and I'm at a point in the game where I'm earning 2500+ a turn), that's a little undervalued. Perhaps scale the value to the size of the active economy (scaled to an average of the total BC earned across all races for the past 10 turns or something?)