I think you're grossly underestimating the stigma that Star Trek had to overcome in order to be accepted by the general public. "Back to basics Star Trek" felt like an interesting proposition for most people, who remembered Kirk and Spock and understood that they, not unlike James Bond, could be updated for the 21st Century. "More Star Trek", which is why you recommend, doesn't have the same ring to it.
But surely having Spock in it would be more of a stigma than not? Spock is associated by the general Star Trek hating public as a nerd icon. Somebody that nerds like. The type of people who make "hilarious" jokes about people living in their mother's basement (NEVER GETS OLD!) would be turned off by a movie with Kirk and Spock in a way they wouldn't have been with new characters and no Vulcans on the bridge.
It's fun to speculate.