I confess I didn't watch the whole film, but bits and pieces of Action sequences on you Tube. I have to say I didn't appreciate the over-done SPFX. Character development and conflict can go a long way in telling a good story. So the Phoenix Character is an Alien, right?
My favorite X-men movie is still Days of Future Pass. X-2, I believe. Then X-1 and 3. In Apocalypse they should have done an origin story on the Ancient Egyptian Blue Menace. It's obvious to me that this guy was an Alien and introduced his DNA into Human Genes. I would have loved to have seen him being worshipped as Krishna in a backstory. The "Blue God" from outer Space who marries an Earth Woman. Because as we all know, "Earth Girls are easy!"