Probably because most X-Fans don't have the attention span to keep track of a story that lasted for over three years.
The Xavier Institute actually became a school for mutants, not just an X-Men training facility.
The U-Men. Ordinary people who want to become mutants so they kill muties and graft their body parts onto themselves.
The mutant drug, Kick.
The destruction of Genosha by the Sentinel Man-O-War.
Cassandra Nova, the yang to Xaviers yin.
The international X-Corporation, because mutants aren't just in the United States.
Weapon X is actually Weapon Ten. The X is a roman numeral. Such genius in simplicity.
The return of Jeans Phoenix powers.
Emma trying to seduce Scott Summers telepathically.
Magneto becoming a celebrity upon his supposed death.
A look at mutant culture. Since there are so many mutants in the world, you would think that they would develop their own fashions, art and music.
So what exactly was so bad about Morrisons run on New X-Men? And what was so great about Chuck Austen? Stacy X? Angel humping Husk who is way too young for him? Some convoluted stuff about Nightcrawler actually being part demon? Havok getting it on with some nurse while Polaris goes crazy?