My opinion is...
YES.
Mostly.
Kinda.
Well, yes, mostly...kinda.
EVERYONE--and I mean EVERYONE, Kirk, Spock, McCoy, Scotty, Chekov, ESPECIALLY Uhura, Carol Marcus in a nice callback to Star Trek II and, of course, Evil Sherlock (and I'll still call him that just in case you haven't seen the movie and seen who he REALLY is)--ALL get some great, great lines and character development...
I LOVE that the first ten minutes feels exactly like you've come in to see the exciting conclusion to an old Trek episode, just on a super-high budget...that's just really fun as an opening, and pays dived ends; it works as just an enjoyable standalone stinger to open the movie and give it the feel like these are the sorts of fun-if-campy worlds and missions and aliens that the old TOS crew used to meet all the time, while the ending ties in surprisingly well with the end of the movie...
And from there it just builds and builds and builds and REALLY builds...has incredible momentum 2/3 of the way in...
...Until it becomes, well, a lot like a certain other Trek film (down to reusing the same lines!) and that was a novelty yet a cheap one...it's sort of fun to see these lines and this situation flipped...
...and thank goodness they ARE flipped, because if it was a straight cut and paste I think that would have really hurt the film, more than it arguably already does, this IS probably the film's weakest point, not necessarily with the reveal of a certain character--I was actually really excited how it looked like they were going to really invert that for a good 10, 15 minutes and approach this character very differently--but just that it DOES become so much like another Trek film that you're left wishing just a bt that they'd not pushed it quite that far...
Because I'd argue that it still works and works very well--but it feels so much like a remake for a good 10 minutes at least, after all that (relatively speaking) originality, and the way they really did let the characters grow a bit in this one, and actually have to face some consequences for their actions and evolve as characters (and there's a good balance, they already feel more like the beloved TOS crew at the start of the film, and by the end of it they definitely have a lot of that feel to them, so they both start off the film in a more polished state than in the 2009 flick and finish in an even better place)...
But for ALL of that, it has a satisfactory conclusion, and satisfying...but not quite as satisfying as it could have been, I think, had they kept their ground and either kept the trajectory they were going with the villain and let him be reinvented this way, or else let him still be running free at the end of the film, thus setting up a cliffhanger and some emotional tension there--
That's maybe the best way to sum things up:
You feel satisfied by the ending (I did, and I DO like that there's at least a chance for the villain to come back) but it's also an ending that could have used a bit more weight...ESPECIALLY considering what source material they're borrowing so heavily from.
But, all in all, I thought it was good, a definite improvement over '09 in most regards, all the characters are, again, better, the plot (the part they actually wrote rather than recycled) is better than '09...
Maybe Trek 13 in 2016 can just take a bit more chances now that they have two solid flicks under their belt, and not rehash the old material so much (I liked the winks at the old material for most of the time...it's just when you get to actually quoting line for line another movie...even though they're not doing it BADLY, they're doing a pretty decent remake...after all that buildup, I'd have preferred something a bit more original, with a bit more weight, or both, and no none pays to see 90% of a movie and 10% of a remake. But oh well.)
8 Spocks out of 10 for me (and Benedict Cumberbatch--PLEASE...take on the world FOR REAL...between Sherlock and this...please, just become Master of all Mankind already and get it over with, we all support you...) ;)