The most important thing that you should be aware of is the proclivity of the game to reset the intelligence of your opponents when using ctrl-n
Used to - they nailed that long ago. If your still finding that with a fully updated product let support know.
I hear the thoughts, I also prefer widespread Races on the map, as like you, I hate "colony rush" games, I'm the builder type. However there are as many preferences as people playing the game, to make everyone's preference an "option" is not practical.
I just cntrl-n a few times. Sometimes I get the impression the AIs are moving slowly, or not at all, and I'll check in-game on their intelligence levels, but since they nailed that one, I have not found an instance of it - its more the AI also in "build mode", there's nothing to colony rush for, everyone is widespread.
Regards
Zy