I hope we remember that for a running QB to be a legit threat he has to keep the ball and make yards reasonably often. And that will check the pass rush a bit and maybe give him room to throw... as well as help our RBs make yards when he gives it to them.
I was critical of what I saw from Vedral in that regard. He was one tough QB, gutsy, but he seemed to predetermine give or keep on his QB runs and not make actual reads in the RPO . I say this because of how many times I thought he should have headed that off or kept it. There were times, of course, that he guessed right or where he was screwed either way.. blown-up OL for teh handoff with a DE/LB keying on him as well.. but too often, it seemed, he was just guessing.. not reading.
And, of course, being a legit passing threat is needed as well. Otherwise they just play man everywhere and have safeties largely in run support or covering the TE in man.
Execution. It all comes down to "repetition" as GS said. Reliable execution.