This explains why

• The Utah offense has gotten worse as the season goes on
• Wilson is always under pressure
• The OL grades well

If a team blitzes, a good QB knows where his hot route is, quickly finds the open man and makes the opponent pay.  Isaac Wilson simply can't do that (at this point at least, maybe he will later).

And at the start of the season (against Utah St and Oklahoma St) the book on him wasn't known yet.  So teams blitzed at a fairly normal or slightly elevated rate.  And Wilson had good moments and bad moments, but looked more or less capable.

But word got out that he can't handle a blitz.  Consider that TCU blitzed 51% of the snaps.  Normally they're in the 20-something percentage range.  Which means there's a ton of pressure (see your comment about Wilson being pressured constantly). 

It also means when the offensive line allows pressure on only 36% of snaps, it's a pretty solid performance.  Even if the same 36% pressure rate allowed would be considered absymal against a team that was only blitzing 20% of the time.

I'm sure Utah is hoping that Wilson speeds up his processing and develops this part of his game to make teams pay for blitzing him.  Ideally they want it for the BYU game, but certainly in future seasons.  The scary part (for them at least) is that this (quickly processing) is the same issue that really hurt Zach in the NFL (after not being a factor against overwhelmed 2020 COVID competition).

This is why Isaac Wilson has been such a problem for Utah. We point out his height, but he really has better physical tools than Cam Rising.  It's the processing where Cam had the advantage (reasonably so, considering Cam was in approximately his 24th season there)