This is the kinda universe writing I like.
A good story concept? Check. A mutant\human co-op that's more of an activist group than your average superhero team.
Character progression? So yes. Alex is stepping up to the plate and being something is brother tried to emulate. A good leader.
Diversity in characters and powers? In spades. We have two founding Avengers on the team, Janet and Thor, two former Brotherhood members, Rogue and Wanda, two war vets, Cap and Wolverine, a pacifist, Wonderman and the leader, Havoc. A young man who has had to do some growing up in a short amount of time. Each with their own set of awesome powers.
And last but certainly not least, awesome universe\lore building and responses from said universe and characters? Yessir. The Avengers Unity Division is an activist group and every activist group needs marketing and funds and good P.R. Janet here is seeling merch is what most political groups do today which I like because it makes the Avengers Unity Division more believable as a team.