I would prefer her to be THE leader of a team. Co-leader is simply nominal.
As far as Emma, I mentioned her as the other shipping option who got away because she has her own independent thoughts and self-actualizing stuff to do.
My "insidious" signature is actually a very real quote.
Edit: Oh and a hilarious Twitter joke from Gail Simone.
Not sure who you mean by detractors but it really doesn't matter. They are free to detract from whatever character they want, whether Jean or someone else; it's good for the comedy.