I think KS is a pretty good offensive coach. I'm not as sure about the head coach part but I'm willing to give it a lot more time and I think he can improve.
As for the people wanting more running, I'm one who thinks we could and should have run the ball maybe another 5 or 6 times against the Falcons, in certain situations. I don't think we should go away from a balanced attack.
But when you watch a drive where Chubb and Hunt effectively run the ball down the throat of the defense with a couple of passes mixed in, and the defense showed no sign of being able to stop them and our OL? Then the next series KS goes completely away from the run and instead puts the ball in the hands of our career backup QB with the game in the balance? I have to ask myself why did the play caller decide to go away from what was working, and switch to something that did NOT work. If the passes would have worked then the decision to go away from the run would never come into question.
KS has done this a number of times. He has a great drive with our running game, then he goes away from it on the next drive. Why not make them show they can stop it first, then counter with play action or downfield passing?
Essentially I think Stefanski is very smart, and very good at designing plays for the most part. But he has a definite preference about what he wants his offense to look like, and he tends to go away from what is working in favor of his idea of proper run/pass balance. I think he may lack feel in favor of analytics, and he seems to sometimes lose awareness of human factors in favor of his play charts. I don't think any of this is disqualifying or damning.
I think he'll be excellent with Watson because he totally prefers the pass to the run. I think he'll minimize the running attack at the first opportunity in favor of a pass heavy attack with Watson on board. But I think it's a mistake to do so with the likes of Mayfield and Brissett when you have Chubb, Hunt, and our OL.