Currently, habitable seems more like a liability. Player definitely wants one for Farming and maybe Light Industry (with Biofactory Embryo). But after that, player wants at least one world with No Atmosphere for Synchrotron, and there are more items that do not want or cannot use habitable.
Sure, variety is nice, but habitable should be a good thing, not bad.
Combat drones suppressing Decivilized while installed seems like a good idea. Decivilized hurts!
While not overpowered per se, Waystation is already too good or good enough to be a required structure. Easy access to crew, fuel, and supplies, and more accessibility to your colony, and therefore more money!
As for Tech Mining, I need the industry slot for more important things early, and by the time I have an industry slot to spare, I do not need Tech Mining because I raided core worlds to the ground for all of the items I need (blueprints, nanoforge, and synchrotron). Tech Mining is useless as long as it consumes an industry slot.