Thoroughly enjoyed it, despite some flaws. Some emotional callbacks, individually some great scenes, acting was solid enough (not quite on the level of the first two) and the stakes were high, but in a different way to the first and second film. I literally just sat and enjoyed it - and I could feel all of these subtle little connections to the comics and the tv shows and allsorts just popping out the film, which was great. Could there be improvements? Of course. Was it *****? Absolutely not. The direction and style seemed v different to DoFP even though it's the same director, but generally, I was watching an X-Men film, which has closed up some of what has come before, and set up a great arc going forward and I look forward to what they do next.
I was under the impression that the power ups faded once Apocalypse wasn't driving the horsemen, btw. He didn't "unlock them" in that sense, he was bolstering them, as he did to Charles. So those characters won't carry on with that ridiculous (entertaining) power level I don't think.
And also, as for the complaints about his horsemen in the past - this guy has been alive for a 1000 lifetimes - that pretty much means he first existed in like 8000 BC. Where we start the story is 3000 BC, where he is worshipped and has horsemen - who then die to protect him? He is then trapped for 5000 years - you realise how short a time that is in the history of mankind? Just because modern humans think that mutants "only" exist in the 20th century doesn't mean they are right - Wolverine alone proves that, as he was around in the 19th century...And it is absolutely clear that apocalypse relies upon that ancient (alien?) technology - his entire regeneration process being built around it makes it fairly clear that is part of his history - how is that different to the comics?
The last act was a bit weak though, I'll give you that. I enjoyed some of the fight scenes, some were just OK.
The actual act of the entire x-men team working as one was pretty good!