Thing is take a look at the films he makes and the cinematography he uses. He has a far more classical eye toward the "golden era" film makers than many modern film producers (who seem to be far more into heavy colour casts, clean visuals and CGI).
You can clearly see that many of his films draw inspiration from not just the story but the style of presentation in, say, a spaghetti western.
Yes he's famous for bloody scenes, but equally he has quite a number of slow conversation scenes that really show he "gets" the characters and film he's making. I think if he does a Star Trek he's one of the few that will go back to hopefully emulate what made Original Motion Picture a great film.
It's a risk, he is very quirky and could go off at a huge tangent, but at the same time I think he could do wonders.
Ps if they ever did a Klingon film he'd be epic for it - granted it would be a very bloody chapter in their history.