There is only one colony skill, Industrial Planning. Since NPCs also use Industrial Planning, it is useful mostly for them. For the player, it is only useful if he avoids alpha admins. 50% more production is convenient, but not useful when player does not need to build more ships.
Unless I want to colonize the entire sector, I avoid AI cores, and I really like the +1 to commodities since three admins are not enough, plus I cannot afford IP admins until late game (upkeep is too high when I have few small colonies).
I agree that the current way is not very satisfactory.
P.S. There is the one idea from Kai in the topic about the latest blog of raising max CR on tier 3 Industry skills (which includes IP) since Hull Restoration will lose its max CR bonus for cheaper deployment ala Support Doctrine/Derelict Ops. It would be nice if more Industry skills started giving combat bonuses.