My thoughts on the "Sherrif" role:
The sherrif should just be enforcing the GM's rules, like the way Sherrifs and cops enforce the laws.
In other words, Austin should be backing up the rules, by trying to stop the interference, screw jobs, and backstage attacks.
He would then still be able to do SOME physical stuff, and yet not be a centerpiece for EVERY DAMNED THING.