Considering all the technology in the TNG era, they needed to reboot to a less technologically advanced period, though update that tech still to fit with the advances in the post modern era (I.E. today). I think that going back to the beginning with Kirk, Spock, and McCoy is alright and they did it in a very Trek way without erasing what had already come before.
As a Trekker everything after DS9 was awful to me, I was literally hating Berman and his era after '97, he was a cigar chomping cheap formula/numbers guy by Voyager, they just weren't as careful with the writing and execution of the shows, which also got lazy during this era. I rejoiced when Berman finally left as head producer of Star Trek because he throughly drove the franchise into the ground by '04.
For me Star Trek had been ruined and I was losing all interest but this movie has brought life back into the franchise and I am excited to be a Trekker again.