Like I said at the time, the issue wasn't diversity itself, but too many top-tier characters replaced and/or dead at the same time. They got too excited with the Jane Thor thing and decided to do the same with pretty much all the main characters at once. And in the X-line, you had a rehash of the extinction plot, done worse, with the main characters of the line in the previous 15 years (Cyclops, Emma, Logan) all dead or out of the picture.