"Why are we using these new aliens when Klingons or Vulcans would work so much better in their place."
"STFU troll, it's called being new and different."
"I call it disrespecting Trek canon and Gene's Vision" (a post which generates 12 Likes)
Exactly. Think of the years of extra entertainment in store for all of us here in the forums.

Seriously, though. I'd accept Vulcans if they absolutely had no other ideas. Watching a regular human try to live up to that inhuman standard would at least have dramatic potential. But exploring an unknown culture would be far more interesting (and would not preclude them from also having some Vulcans or other established races running around in other parts of the story).