Plus interviews hyping the Next Big Thing Panel where 6 new books will follow the events of HOX /POX, so that's to draw fans into reading & sticking with the minis that will lead to a new era.
Granted, we've heard this before but maybe it'll mean with more with Hickman, who has reputation as a "superstar writer."
In terms of the craft of writing comics (i.e. structure, layout, composition, symbolism), Morrison was hands down the strongest writer to ever work on the franchise. For example, the "silent issue" with Jean and Emma going into Xavier's mind is one of the best X-Men comics ever written.
In terms of concepts and ideas, he was fairly strong as well. Scaling up the size of the mutant population so that mutant culture was a viable idea in-universe was an innovation for the X-Men mythos, and it opened up all kinds of new story possibilities. Also, his revelation of the Weapon X program being just one iteration of a much larger and long-lived Weapon Plus initiative was clever as well and wove a part of the X-Men backstory into the fabric of Marvel Universe history in an interesting way.
Where Morrison fell down was in characterization and his portrayal of relationships. He got Scott and Jean all wrong. He got Magneto even more wrong. He made Emma more entertaining, but weaker. Other than Quentin Quire, his big villains--Cassandra Nova and Sublime--were rather one-dimensional and "meh".
Overall, Morrison's run was a mixed bag.
People will read something if it looks good. Immortal Hulk proves that. People were hyped for Thor for a good chunk of Aaron's run. Amazing Spider-Man will sell if people are confident in it. Same with Avengers.
Now, I am not saying don't add more X-books at some point, but don't squander the good will this Hickman announcement has earned, and don't underestimate just how much Hickman alone will do, by associating a bunch of obviously dead weight books to this Dawn of X.