To me this would be ideal. Not because I think these two guys are destined for greatness or anything, but because it is important to have offensive continuity by running a system you can promote internally or go hire replacement coordinators for if your OC gets a job elsewhere. DeMeco will always run the same D so we have continuity there. The zone scheme is a good scheme, but being able to swap coordinators and keep on-field personnel and approach the same is more important. Having long term continuity on both sides of the ball is crucial.
Also, I heard Mark Schlereth say once, when talking about Arian Foster’s success, that zone OL are built a little different by body type and skill set and tend to gravitate towards zone teams, and therefore it’s easier to build a line or continue success with this scheme in the NFL.