A few things:
I think that this new imagining of Trek is pretty good, it brings it to the new generation, and the things that bother me are not significant
Oh, and about how Kirk was promoted so fast.. remember, Pike had served with Kirk's father (so the new movie established), about 90% of the graduating class just got blown up by Nero, and besides Kirk, who else on board had even taken the exam to become a high ranking officer? For me, I see it as a different Starfleet. It was kind of 'sudden', but it was basically a field commission, I doubt Pike expected that Spock would go all wigged out and that Kirk would actually take over. Pike was just establishing a chain of command for his absence, which he probably expeced to last not too long. (Just saying). But, saving Earth usually makes poeple want to hand out awards. Besides, none of the other characters really reached in and took posts that they were unprepared for (McCoy was a doctor before he joined StarFleet, and was likely the highest trained medical person on staff, the others were the best in thier field, but didn't really need a 'rank' to do the job that they were doing).
Overall, I'm going to miss Vulcan, but I'm excited to see where this new universe goes next... maybe a new threat from that reigon of space, without the Romulan Empire to stand in the way...