At least two of the new X-books were not subject to any research whatsoever.
No one involved in writing or editing Phoenix knew who Corsair was before the issue went to script. It just isn't possible to have written him so off, like a knockoff MCU Star-Lord looking for a big score, when he's been a trusted friend since the 1980. Every writer will have their own take on any given character, and wildly different variations can diverge over the course of decades of stories, but this version of Corsair is just not a valid continuation of anything that has ever been written about him before, across any medium.
And there is no way that anyone involved in creating X-Factor has done any reading on any of their characters. None of the established characters would sign off to work for Alex's shady team of reality TV cops. Cecilia Reyes is joining a military operation? She wasn't even comfortable being an X-Man, and she at least agreed with their values. Frenzy and Pyro are assaulting dissidents because some general and her corporate overlord ordered it? They should be attacking the humans to help the mutants escape, not taking any part in raids on their own community.
(Also Havoc's clear disdain for Pyro, while perhaps in character for him to express, feels too much like it carries authorial intent. Pyro's work with the Marauders was a hell of a lot more useful than anything Alex has ever done as a failed superhero. Alex isn't the one suffering with losers here)
Polaris, I can accept that she's been through a lot and finds herself in an uncertain space. But if she actually intends to be a part of an underground movement, she's simply too big of a name in this universe to resurface as the random underling to a group of nameless generics. She was one of the leaders of Genosha. She was chosen from among millions to represent Krakoa as one of their X-Men. She does not need to prove herself to any of these people, much less get talked down to by them. Is Mark Russell not aware that she has a history outside of being Alex's girlfriend?