I don't really see zone scheme either. Usually you go lighter, quicker and more agile. Our line looks nothing like when we ran zone.
I'm hoping we are moving to more RPO.
An RPO can run any OL blocking scheme. It can run inside or outside zone, it can pull OL and run sweeps, it can trap, etc. There's no limit to what an RPO can run. It's all just about the scheme of who is running it and what they want their run options to be...
Typically Zone schemes take on larger, stronger, and sometimes dumber OL and have great success - as long as the OL can get out of their stance. The Zone can definitely use a quicker OL, but the whole reason Zone became a thing originally was for larger OL as it suits their skillset.
The places I've coached and played that used offenses like the West Coast, Wing T, variations of the I offense, Power Wing, and Fly offense have typically had quicker OL and they often had someone pulling or trapping on the OL every play (Trap/Sweep/Boot/Reverse/Belly/Power/etc.
Blocking schemes that pull, trap, and have lots of OL movement typically want mobile OL in it.
IMO our OL is situated more for Zone than anything else. We don't see
much pulling or trapping in our scheme.