I never really gave my thoughts on the movie:
Actually, I didn't think it was bad. It had a pretty major problem in that Apocalypse was a dud who had a decent introduction trying to duplicate Days of Future Past's brutality, but then he and the Four Horsemen mainly stood around doing nothing but went on about how humanity lost its way in not worshipping him, but there were some things I liked about it too.
It's taken him three movies, but I'll be damned if James McAvoy hasn't become a credible young Xavier. We were talking in the Star Trek thread that Pine's Kirk still doesn't appear to be progressing towards Kirk even though he's in his third movie now and almost as old as Shatner was during the classic Star Trek run. From this point forward, yeah, I can now accept McAvoy as a replacement for Patrick Stewart. Something I wouldn't have been able to say a few years back. He's still playing a younger version (see his scenes with Moira), but things are coming together.
I rather liked Sophie Turner's take on Jean Grey and actually prefer her over Famke Janssen (who, I'll be honest, I never really thought made a great Jean). Only complaint there is that it's too early to bring the Phoenix back into this again. Let Jean be awesomely strong on her own for a bit first. Kodi Smit-McPhee's Nightcrawler was one of the few actors who tried really portraying a previously seen character as a straight-up younger version (Alan Cumming's Nightcrawler) and I rather enjoyed it. Considering Nightcrawler has awesome powers and a cool look, that his character is intact is a major plus.
A few things that didn't work so well, Mystique and Magneto coasted on their previous movies. Both Mystique's role as the mutant hero and Magneto's loss of family really were interesting ideas that could have easily been more powerful if they took just a bit more time. And, of course, Magneto killing a few million people without reprecussion or even chastisement won't settle well. Olivia Munn was simply miscast as Psylocke. She's got the right look as a cosplayer for a photoshoot maybe and I actually really like Munn, but anyone who saw her runs on Ninja Warrior knew that she didn't have the native athleticism to be an actual ninja. She's like Rebecca Romijn, cast for her body, but unlike Romijn, she doesn't know how to use that body to make me think "dangerous". Put in that she ended up the only person who wore a straight-up adolescent fantasy comic book costume, and she feels weirdly out of place throughout. Luckily, like I said earlier, her role ended up being just standing around and pointing at powerful mutants. Also, everyone already hates Ratner dude, no need to pile on while patting yourself on the back a decade later. Not like your Superman Returns movie lit the world on fire.
Scott, I'm a little on the fence about. Probably too early to tell. Though I was annoyed a bathroom door saved that bully's life, and why a piece of cloth was capable of controlling his powers is a mystery. For that matter, apparently all mutant powers are now nullified by an electric fence for reasons. Quicksilver was fun, though they basically repeated the same trick and upped the CGI and length. Though I laughed at pizza dog's closeup. I also laughed to find pizza dog's real name is Tauntaun. Storm was okay and will be usable going forward. Wolverine's cameo was reasonably good idea that was overdone. Part of me likes that he had his moment with Jean, but the greater part of me wishes we had only seen his face once, when he walked out of that cage naked, and then nothing more as he left all those corpses in his wake.
While I can see why this movie disappointed a lot of people and is Singer's least successful X-Men movie, personally I came out of the theater happy enough, but knowing that there were problems.