As I have said before...there's a reason the starter is starting, bad as he might suck, he beat out the others. Do others sometime surprise? Yes. Do coaches make mistakes? Yes. But, in their minds he's better than the other 2.
That said, IF Frazier can't run the whole package, so what? Trotter can't either. He may know the plays, but he can't/won't execute a good part of the passing package.
My fear is this will take an epic meltdown by Trotter before they'll say "fuck it, what's left to lose?" and make a change.
By the way, I suspect that Clint will be more of the same. If the change is made, it needs to be Frazier IMHO.