I am fully aware that time travel has been a staple within the Star Trek universe, what with the fifth movie having a plot centered entirely around that subject (the one with the whales is the fifth, right?). But what concerns me most about the newest Star Trek movie is that its use of time travel is essentially a non-starter. What do I mean by that? The problem with the newest movie is precisely that its time travel narrative essentially makes the entire movie pointless. If it is that easy to manipulate the course of time, then what is the point of telling a story in this universe? Some new writer could come along and rewrite the entire universe again just so we have something "fresh" and "new" to work with. And in another ten, the same thing (or maybe forty would be the more appropriate number, since that's sort of how long it took to get this reboot).
What about the characters? They become meaningless too, because nothing they do actually matters. It can simply be rewritten. Some characters might not exist at all and some will be replaced. This is the problem with time travel narratives as a whole. Back to the Future only works because it makes fun of itself; the series is centered around a purely comical farce and doesn't take itself too seriously because of that. But Star Trek is not a comedy, nor based in a universe centered on a farce (at least, it's not supposed to be). Star Trek takes itself fairly serious, because it should be a serious endeavor; the shows and movies try to address a possible future, not a farcical one (can you really take seriously a time machine built into a DeLorean or, dare I say, a hot tub?).
This fact is what bothers me the most about the newest Star Trek. It is too easy and simple to rewrite the course of history, to rewrite characters and plots and entire populations of people (you can now destroy planets, never mind that the very concept of one ship taking out an entire advanced civilization is so mind-bogglingly idiotic it hurts to think about). If Abrams wanted to rewrite Star Trek, he should have ignored time altogether. Just rewrite it. Take the old, update it, make it flashier, stronger, more character driven, and so on. Don't establish a precedent for the pointless.
Or, perhaps the better idea would be to ignore the standard cast of characters and start something completely new. It's yet to be done. Nobody has started a Star Trek movie with an unknown group of characters (or at least a group that hasn't been talked much about within the various series) and spawned a series of films about them. What a better way to reboot a franchise than to start clean!
But maybe that's why I don't make movies. Originality and logic seem to have fallen to the wayside in Hollywood.