I think both. It seems he was half-assing what Jauron wanted to implement while doing his own thing, which is why Jauron seemed to be on his back all off-season. If an assistant coach is not following what the head coach wants then there will be major problems. I'm an assistant coach for a high school team, and even though the assistant coaches might not like what the head coach wants, they still follow his rules and continue to run it his way. If not, then the team cannot continue forward without further complications, which is what I think we saw with the Bills offense...especially this preseason.