If you asked me, which you obviously did, I would say the difference in blocking schemes between Coop-Tress-Meyer has had less than a marginal impact on our run production - but that the QB coaching in the run game itself has paid massive dividends in the run game as a whole. That and a shift from game-management towards quick score offensive philosophy.
Troy and Krenzel were great situational runners when the designed play broke down or expired. But now with more designed QB runs, Urban and his QB coaches (mostly Herman) are teaching the nuances of the point of attack of the read. JT initially started over Cardale, in as few words, because he could take the unblocked D-lineman out of the play every single time we ran the read option. His mesh point with the RB is an actual thing of beauty. And when the QB is forcing the box to stay at home, freezing the linebackers, a gap savvy back like Zeke can just take and go.
It's not so much one thing that has allowed Urban to succeed with his backs, but the holistic system that attacks every inch of the field with little -to no predictability. Balance, not just in run/pass but HOW you run/pass. Equal parts between tackle, off tackle and jet sweep ground looks. Same number of hitches and outs as GO routes and drags. Understanding of specialization - sending guys like Jalin and Dontre into motion across the formation to alert the edge linebackers. Urban just understands how to spread a defense thin and shatter through it like glass.
I still to this day swear that Beanie Wells would have been Meyer's best RB. Zeke and Hyde were ballers, but they wouldn't have gotten half the yards that Beanie did in the Bollman offense... running the Dave. Every. Single. Play.
The zone-read, and all the packages that followed its invention, have quite literally changed the face of football. Or at least it's the face lift of the most efficient offense ever created - the Wing T/Veer.