Fair piont, Mike, but isn't it something that Trek has always been guilty of? Just think of all the time paradox episodes they've done where everything gets reset to normal at the end of the episode.
The reason the new movie outright sucks has nothing to do with the beliavability of its science, but rather with the believability of its characters and their motivations/actions.
That is a major difference.
The believability of the "science" in science fiction can be stretched quite a bit, as long as one stays at least somewhat consistent within the world one presents.
But characters, their actions and their motivations... well, once you stop caring about making that believable, your plot basically dissolves into incoherency and becomes a random selection of scenes that just happen to be presented in that order because the producers decided it to be that way, not because there is any kind of coherent or consistent storyline to follow.
And for me this is where any kind of "tension" or "suspension" evaporates instantly and gets replaced by eyerolling. As far as making movies goes, it's simply lazy and sloppy.
Once you cross that line.... you basically go into "lala" land, no matter if you talk about science-fiction, fantasy, or whatever.