You are being obtuse if you are going to pretend a lineup with Jean, Cyclops, Storm, Beast, Nightcrawler, and Xavier isn't mostly A-team. And yes then you have some "unusual" additions like Mystique and Quicksilver. Also you bring up Angel, Psylocke, and Jubilee a lot. Yeah, I'd like Psylocke in a movie (I'm less keen on the other two) and done well, but did you not notice Apocalypse was too crowded? I'm fine with them being out if it means the next one is less stuffed to the brims with characters who just stand there (Angel and Psylocke) or do nothing at all (Jubilee). And let's be honest, most audiences would be way more bummed if Quicksilver got cut than those three.