Just a couple of things I've noticed that I hadn't seen mentioned (Though I admit to not opening every thread)
The Cost of outright buying a Stock Exchange is almost half of what it is to buy the preceding Banking center. I tested it by buying each on two empty tiles on the same planet and the Banking center was 1534 while the SE was only 868. This is Terrans, Neutral Alignment if it makes any difference.
For the RC. I have a Tech Capital producing 624RP. I built the Research Coordinator and the planet only went up to 647RP. Seems more like it's closer to 25RP instead of 25%. I'm not actually sure how the RC interacts with bonus RP and such, but this still seems way off.
Besides that(and other well known things) Thanks for the new addiction