I agree with that, but on the contrary, I wasn't referring to Mafah's blocking but the blocking of his OL. I expect his size and strength would stand him in good stead for the blocking that you referred to. I'm fairly confident that he'll be capable of meeting the requirements for doing that.
I wouldn't be surprised, in the least, if the newest version of the Cowboys OL meets the necessary standards that the NFL demands. In fact, I believe they'll turn out to be an improvement over their predecessors. At least, I'm definitely hoping that's the case. I think they'll open up the lanes that will make the most of Mafah's abilities, even if he's less than ideal as a runner.