I was thinking for the next fallout it would be good if it could focus on the Chinese. Maybe it could be in a different state of America where a massive amount of their forces were attacking at the time the bombs dropped, There could of been many that survived and maybe had children etc and have been building a military and are still wanting to annihilate any American still alive.
This could even introduce a new American faction that was unknown who is in constant battle with the remaining Chinese ?
I think this would also help return some atmosphere, As I was not a big fan of the legion.
I'm not that great at writing down what I have in my imagination but I think you guys sort of get the drift of what I am saying.