One of the recent updates made the Ai give planet quality some consideration for colony ship targets, but after digging into the planet types file ¬ finding something to comment out to stop the ctds, I started looking harder
•a lot of those things give significant bonuses (+/-25-50% on 1-2 things). The Ai should give those consideration too
• the flavortext for the planets should be more clear as to the size of the bonuses (https://forums.galciv3.com/461217/page/1/ ) does it & made me think of an eventual mod for after beta 
there are some cool things that can be done with them