So, I spent some time to understand how the colony currently works, to try to figure out how much it impacts the game, why it doesn't grow in most games, and if there is any way to exploit that mechanic, about the latter, I couldn't come up with anything...
Also I guess that this mechanic is a new and raw still, so maybe it's a good time to give my 2 cents for that.
Currently the colony serves as a resource sink, however what I noticed is that there are a lot of conditions for a colony to grow, basically if any of the life support resources is above it's limit, then it stops growing, even when the other 2 resources are really cheap.
1) so first suggestion would be to take into account if some of the life support are very cheap and count that in, also the speed at which it grows/dimishes could change more gradually making it possible for a colony to maybe even swing up and down during a single gameplay. Maybe instead of strict price bounds also have a budget (similar when deciding to upgrading) per some time (in the mod files, all values are for 1000 seconds?).
Second thing I notices, is that all the Job buildings that consume other resources than just life support will buy them no matter the price.
2) It would be really cool if consumption of a resource is increased by some percentage when the price is low and lowered once the price is already very high, like labs food orgys when food is cheap, or more crazy experiments in labs when chems are cheap, but when the price is high, colony starts consuming tighter.
3) UI wise, it would be nice if I could see the average consumption of all the resources the colony spends per second. Like I guess port consumes 0.2 fuel per second and each lab consumes 0.1 chems per second? But currently I would have to go through all the buildings, look their level, and then consider population compared to the current gap and then try to make an educated guess how much a resource is being consumed, meaning to figure out if colony has any impact.
4) Currently if I would want to influence the direction of the colony I would have to keep life support prices low, which is not something that helps me win, also I would have to keep the aluminium/steel/glass prices at bay and propably sink one of them to get specific type of jobs building, which again I think is too costly and the impact isn't really worth it. Maybe it is intentional that colony is not meant to be exploited strategy wise, but it would be cool if it is possible.