For me there are a few key take aways.
1) Texas Defense suffered this year primarily due to passing game issues. A) Big loss of talent in Draft B) big loss of talent in DBs coach C) I firmly believe Akina was as much a factor as A and B maybe more
2) We could get really deep in the weeds, but in a broad take to avoid the Surly Decimal argument, at this point in their career Muschamp and PK are on similar levels of production.
3) The real issue wasn't with our Defense in broad strokes. Why are we fixing what ain't broke and have yet to address what is?
This is why I'm guessing many people, like myself are WTF! I do know Surly has a deep bias in favor of Muschamp and that's going to cloud the views of many, but the broad question remains. Why did PK get fired for basically a similar level guy and not the OL which has always been an issue.
My only logical conclusion is the PIP drove Sark to it, perhaps because he's very resistant to getting rid of Flood and Brandon Harris and had to make a big move due to the PIP? That's what it looks like to me, time will certainly clear items up.