I'm hoping the extent of life support is "Hey, if you run out of charge, Jebediah will freeze to death in the depths of space!" and that "Hey, if your colony doesn't have enough snacks, your kerbals can't do the thing and make more kerbals!" I feel as if any serious attempt at life support would turn off more casual players, and reduce some of the things you could do in game (no 3-part missions, because you need food for your kerbals). I feel like if a mechanic reduces the possibilities for missions, it shouldn't be added.