Sounds like great changes!
One question on colonization: is it just a binary troops present/no troops present or does it scale with the amount of troops or anything else?
And is it still possible to fight the other colonizers troops in the still neutral but contested territory without being at war with him? I'm not exactly sure if podcat wanted to say it's out by this:
no fighting. the ideas is the troops are there and create lots of tension which leads to you being able to push through a CB and attack if you want, or if you lost the colony race to take back the land. Random fighting outside actual wars creates lots of problems and I'm not convinced it adds that much to the game. I like this tension increase much better as a solution.
its a flat bonus, so it doesnt matter how many troops you have