I was never happy that Jean Grey was brought back. It undermined one of the best superheroes stories ever. I can't say I ever regarded it as a tipping point but clearly, it does represent an important step in the direction of which comics have become.
Unlike, say Captain America's death, Jean Grey was alway really dead. No one acted as if she was coming back and this was just a stunt. However, I am not unhappy with the Cap story as Brubaker was obviously setting it up to bring him back from the get go. So bringing back Elektra, Norman Osborne and Jean Grey are bad as they were really dead whereas bringing back Cap is not bad.
I guess I can see where you're coming from, BUT...when JB was involved with Jean Grey's return, such storytelling devices were not really prevalent (as it has apparently become in the new century). Should JB be blamed
(in a detrimental sense) for trying to tell such a story at a time when such storytelling devices were quite rare?
I don't see HOW Jean Grey's return represents an important step in the direction in which comics have become unless one thinks it started a ball rolling (and as I indicate, the ball didn't even START rolling at Marvel until the new century...practically 17 years after JB was involved in the original story).
Blaming JB smacks of desperation from certain opportunists to me, but hey...I could be wrong & those that normally go out of their way to detract are not intending such a thing...this time...if that is the case, then my apologies to those that have no such intentions.