Well said. It's a risky move but I don't mind it anymore. PK has been great, no doubt, and I actually don't think the D has been a problem against good opponents (think about both tOSU games, OU, A&M, most of UGA, etc). That said, last year was the outlier in pass defense. It's been an issue more often than not under PK.
The intangibles you hit on are big. The team seemed to lack the same intensity this year that they had the previous two. Muschamp should bring back some of that fire.
The biggest thing I like about this, IF true, is that Sark claims it will allow him to focus more on the offense. I've been saying for a long time that if he wants to be the OC, he needs to take other shit off his plate. In his presser, he said twice that Muschamp will be "HC of the defense" allowing Sark to spend more time on the offense. We'll see if that actually happens, and I have some skepticism, but it could be huge for the offense.
Imo his biggest problem as OC is that he is probably spending 30% of his time on offense vs. the 100% an actual OC would spend. With that in mind, OF COURSE he isn't going to be as good at it. It would be the case for anyone. When the defense is on the field, an OC is looking at stills of what the defense is doing, talking to the QB, and thinking about the next playcalls. With Sark, he's coaching the defense and not doing any of that stuff. That makes the OC job a whole lot harder. This won't get him to 100% time but the more the better.