I agree the game plan was sound but Mike Tyson use to say everyone has a plan until they get punched in the face. My issue with BoB is he sticks to his plan even when he is getting hit in the face with a baseball bat.
Jokes aside this is, to me, his weakest point in that once he has a plan that he believes to be sound he almost never switches it up no matter how much its not working. Watson is holding the ball to long and trying to extend plays, ok as a coach that's where you look at it and say, I can't stop him from doing that in the middle of the game so let me change it up, call for short plays, 5 yard passes or such, and then we'll work on that on the practice field. To me the best games BoB and Watson had were the ones where frankly they were just making **** up because the plan was for Tom Squamish and wouldn't work for Watson so they were just trying everything.
Now clearly that won't work long term but its more the general principle, if the plan doesn't seem to be working then stop trying to force that square peg into a round hole. Hell he's sent Miller up the middle so many times my wife has started to be able to predict it and she hates football. Again though it works a couple of times and rather than that being seen as the exception its taken as the rule.
I'm not knocking a 9 game win streak, got to be doing something right for that to happen. However, if BoB could learn to be a little more flexible in his play calling then I think he could take his coaching to the next level. Maybe he's worried about Watson getting hurt, maybe Watson is still a little green and is falling back on bad habits that you can get away with in college, maybe Bob just does need an OC that can focus just on the offense and not worry about the team as a whole. (this is the one I think is the issue) Whatever the case while the team will have a good year, assuming we don't get wiped out from every game onward, to be a real super bowl threat this to me is the biggest issue beyond team weaknesses like the OL.
