Haven't had time to sit down and write anything yet but...
- I hadn't really been considering psychic abilities once we went the alien visit/nuclear warhead apocalypse route. Physical, sure - maybe with a drawback of some sort that's semi-obvious (weird feature(s), dietary needs?).
- Most of the mutants were going to be in the twisted, weird, and antagonistic NPC category. Doesn't mean characters can't be, but the majority were going to be more than a little strange.
- If people must have supernatural powers that aren't physical in nature, there's weird alien tech that can be dealt with. It won't work perfectly and it can backfire spectacularly but it can also do some crazy stuff. (Nothing defined as yet - was going to address that case-by-case.)