It's funny, some folks are castigating Bevell for not changing plays quick enough. So, what's he supposed to do ? IF we run 2 run plays, and they don't go for much, we just abandon the run and go 5 wide the rest of the game ? Brilliant.
You execute your game plan, since it was scouted and practiced all week. Usually the reasons plays don't work is getting defeated in individual matchups. Getting in poor sets against a defense or personnel grouping is on the QB for in game/ in play adjustments. Getting back to executing the game plan, you make minor adjustments in between series, then you go into halftime, get your aggragate information from the half, and make the major adjustments.
I've seen this done with damn near every good coach out there. The GB game this year against us. The Patriots just about every game (they are good enough that they can make end of quarter adjustments....a lot of this is Brady).
If we lose Bevell, I'm going to bet a lot of people will be whining for him after he's gone, vs. whining against him right now. He's done a great job of implementing a new offense during the season; I'm positive the zone read was never on the table during TC. He's also done a great job with a rookie QB that didn't get 1st team TC snaps like every other starter in the league did.