^^ The core problem was McCoy being in the government in the first place after Mags almost killed everybody
Not bringing Grammar back is a great way to ignore TLS
as much as reasonably possible without denying it entirely.
X3 might have sucked but Grammer was a terrific Beast. Well-suited for the role and one of the best things in that movie.
I liked Hoult as Beast though I didn't like is that they decided to make him the smartest man on Earth. Beast is a genetic scientist but all of a sudden he's creating Cerebro and the Blackbird, things that have never been his area of expertise.