You keep on saying he is wrong, but you don't seem to offer an alternative solution to this problem?
Doesn't mean Marvel or DC cannot collapse in the future. They probably will if they keeping relying on the same aging fan base.
And how many new readers did this story bring in?
Was there any setup or foreshadowing of Moria even being a mutant before this?
That is a pretty minor retcon compared to the Clone Saga or One More Day or this Moria storyline.
This more like the Terminator film timeline that has become such a convoluted mess, that they have rebooted the timeline several times and the universe makes no sense pass the second movie.
Heck was Rey retconned into being Palpatine's grand daughter in the last Star Wars movie good storytelling? That is part of canon and a major retcon, was that good?
Where is your evidence that supports that this story brought in a ton of new readers?