What bothers me is this- by setting it in an alternate timeline, it means the 'future' of this new Enterprise crew is unwritten.
Bwah-ha-ha-ha-ha!
That's the best thing about the film. They can go anywhere they want from here.
And all those original episodes and films are still there to be rewatched whenever we want.
A new timeline means the original timeline was ERASED
What about the Mirror Universe? That's an alternate timeline that coexisted with the one we all know and love, so why can't this one too?