Apparently one of the new features is that races will only be able
to colonize more specialized planets. This may further cut back
on the colony rush (maybe not). And this may help the ai a lot.
I know lots of experts may despise the colony rush. But I like the choice.
I do like lots of colonizable planets and set up my game that way.
I hope the new expansion pack makes this "feature" an option rather
than a mandatory part of the game.