This list really means nothing. When the world is ending and they need the smart people in a room its gonna be the same 6 heroes you always see.
We need better comics
In a way it makes sense though. In the case of Val and Moon Girls, they're essentially little kids. You can argue they shouldn't be involved in big end of the world events.
Cho could make the cut though. Right now he's the Hulk... and it's usually handy to have a Hulk around in situations like that.
How long is this Moon Girl thing going to last until Reed retains his title?