I'll put it bluntly. Why would people who gave the last four movies and last two television series a complete miss, suddenly come to this one? Would people accept a whole new cast, writing, sets, etc, that's 'original series' just because it says
it's 'original series'?
If you're going to base your hopes on the success of this film as being 'the original is back', then it needs to be 'the original' as much as what's feasible. The more you vary (particularly in ways that you don't need to), the more it's going to be 'just another Trek flick from MilkingDeadCowFilms, Inc.'.
And how, exactly, is that going to bring in any butts on seats?