Same thing was said about DS9. And Discovery. And Lower Decks. Star Trek has proven itself to be very adaptable from comedy, to horror, through action and drama - and that's the films alone.
I suspect we may well see S31 shown for what all intelligence organisations are: corrupt, inept, and deeply hypocritical to civil society. Doesn't that sound like Star Trek to you?
The teaser trailer looks like a high energy superhero romp that's closer to Guardians of the Galaxy, than it is anything Star Trek.
And I just don't like the idea that section 31 is made up of a bunch of oddballs and misfits with no discipline. Makes the movie more 'exciting' I guess, but really? Section 31 should move quietly in the shadows, not all brash and ballsy.
I'm sure they are hoping this style will boost revenue by appealing to a younger demographic, but it's just totally the opposite of what I want from Star Trek.