To be fair First Class preformed badly because of how badly the OT cast ended things in X3 and Origins as well. Apocalypse was a generic movie in a very crowded year. Though if Supernova also preforms badly with a good critic score then I will absolutely agree with you. Don't really want a cross-over with Deadpool though.
I suppose not. I think a post-2029 movie would be possible, but probably not an X-Men movie imho. Trying to build a franchise on two version of the same team isn't going to work. It could be a very different movie though and a bigger team of Mutants hiding in the dark world could be interesting. Just as long as they don't use any of the characters who show up in the past.
Yeah we are on the same page as far as this goes.
Kelsey Grammer, Shawn Ashmore, Anna Paquin, Ellen Page, Aaron Stanford probably aren't any more of a draw than the First Class cast though. Heck DOFP did very well without Famke Janssen and James Marsden. The main problem I think is that the First Class trilogy hasn't created it's own bankable character(s) like Wolverine. Eric, Charles and Mystique aren't really characters you can make your movie rely on. Which is why they really should build up their young team the best they can.
That we will.