I suspect it has a lot to do with how the D's play so close to the line, seeing that the long ball threat isn't really there. Yes, it's burned them a few times. But in the long run it's the best defense against our offense. We do run a jet sweep, or at least we used to when Parris was here.
I'd say Q is the best OLman that could handle the outside zone. I'm not sure about the others. I'll leave that to people who know the line better than I do.
Also, you need to have a RB with great vision. JT's forte is with the inside zone.
Just my 2 cents.