First off, the Pats never stick to one "scheme" on offense or defense. Their is a basic philosophy of keeping your oppnents off-guard but I've seen everything from the 4-3 in a SB to no DL's and like 7 LB's all moving around taking no discernable position before the snap (against Jets?).
Granted the OL has had a primary philosophy toward the running game blocking for bruisers like Dillon and A.Smith (who did a solid but unspectacular job). They've shown they aren't afraid to run a draw with Faulk in the shotgun. They run screens, end arounds, reverses. Linemen pull, trap, misdirect.
My point is Maroney has a different style. The smart thing to do is adapt to it. Does it mean Maroney will never run a wham play? Bet he runs quite a few of those plays. The OL needs to figure out Maroney the same way Maroney needs to figure out what works best for him on the field behind this OL and TE and FB blockers.
"Zone Blocking" looks good on paper, but only translates so much on the field. You still have to figure out the opponents D. Where the pressure's coming from, who's playing run, who's dropping into coverage. Coaching and scheming mean nothing without the ability to adapt to the situation. Excecution is great when you predict the other teams reaction, but with 22 players on the field anything can happen. Offensive Lineman make many key plays outside the "scheme", we just overlook them.