I thought Warren had a great final scene -- I'm sure everyone ended it with the hug, it felt the most appropriate, it was a very tender moment.
Someone mentioned it above -- but I was worried when Max was going through the same dorm corridor over and over it was going to reveal she was Rachael Amber! When they gave Max her outfit and starting playing Chloe's dialogue, thank god they didn't, the game didn't need a big twist.
It ended fairly predictably, at least the sacrifice Chloe ending did -- but it was appropriate, expected. I mean, even Chloe must have known herself in the back of her mind it might have to come to this, but it was really well done regardless, it's clearly the intended ending. However first time through I finally did what Max never really could and picked the selfish ending, sacrificing Arcadia Bay, at this point I knew exactly what I was doing, but I closed out my season with an "All for Chloe" mindset, even though her being alive is really the only net positive.
I figured people might not like the nightmare stuff, but I really enjoyed it, it really helped ramp up the sense of foreboding closure, and highlight everything and everyone in Arcadia Bay, and everything your friendship with Chloe means. The bottles callback was delightful, too. It was clearly the devs laughing at themselves and players reactions to that bit in episode 2 -- I remember some people really were fucking annoyed with that section, when I got to it, it hardly bothered me it was a short little interlude, but I appreciate the callback here.
Only thing that wasn't perfect were the first few Mark Jefferson scenes, they all wen't on a bit long, and very little was established beyond "Jefferson's a fucked up crazy guy". The later scenes were a little better -- when Max could actually have something or a dialogue with him -- especially the nightmare scenes, they were on point. That moment when all the dialogue response were the worst thing ever was great, a nice play on the traditional mechanics.
One last thing, I'm quite surprised anyone expected the reveal of Max's powers, I'm glad it's just some completely mysterious force, the real story is the coming of age one, not time travel.