I'm just going to say this, because I was thinking it, and it probably means nothing.
Sean McVay is 32 years old. He was 22 when Gruden was fired in Tampa Bay. That's the last time the old-school WCO was really used, (even Green Bay has hybridized it).
There's no way he's ever seen it before. There's no way any of his players have seen it before.
I just wonder, if, and how many times, the Raiders might sneak up and beat some people who regard the WCO as they regard the Wing-T, and are unprepared to face it?
Dnnno. Just talking. The pure WCO though, wasn't something I've even considered thinking about the Raiders this year. Probably means nothing.