Good example of how the head coach is really what matter as well, not the OC. Daboll left the Bills and they don't seem any worse for wear with him leaving. Might have more to do with the QB and the talent around him, eh?
Daboll was there for several years. So, it was not a revolving door at OC while they developed Josh Allen. I think that is huge. And a follow on to that is they promoted from within to take over the OC spot. So, it was likely not a whole new offense, new terminology, or philosophy. Again, imo, that is very important to their continued success.
IMO, and I said it before Eberflus was hired, if you hire a defensive minded HC, then they need a succession plan at OC if/when they start winning and teams hire away your OC. So, I am curious if they are grooming anyone on the offensive staff with that in mind where they could take over if/when Getsy leaves? Does Eberflus have connections to other people in the Shanahan/McVay tree if he has to outside the organization? There will always be tweaks to the systems over time, but wholesale changes of the philosophy for the running game, route concepts and terminology is what they need to avoid.