Agree. It's still struggling to come back from this.
It also painted itself into a corner when editorial let over a decade's worth of franchise narrative revolve around a single character, shoving most of the rest of the cast onto the back burner. Since then, it's like writers have forgotten how to write a true team book, so a constant feel of underdevelopment has become the norm, building resentment if you aren't a fan of the particular character in the spotlight of a run. Pair that with far too many mutants and it's a recipe for dissatisfaction.
In short, it feels like editorial or a particular writer is trying to choose for readers who is important and worthy of caring about, rather than presenting multiple well developed characters for them to choose from.