Luke Braun from Locked on Vikings podcast (a pretty decent listen, he's a pretty sharp young guy, definitely a detail-oriented nerdy kind of football guy, very smart), who was somewhat high on Penix earlier in the process did a deeper dive on him in the last couple days, talked about him at length.
All the normal positives, good deep ball, decent arm strength, et al but talked about a litany of concerns. Most of the concerns centered around mechanics; arm angle, footwork, body-rotation (can tend to use too much arm, not enough body rotation), release point, what he does when there is pressure; when you have a really good QB and a really good WR, who is making who look good? And it sounds like Odunze made Penix look good a whole lot more than Penix made Odunze look good, as far as ball placement, anticipation, etc.
He did say one thing in closing though; drafting a QB in the 2nd round (or even the 3rd and beyond) doesn't get your fired. Selling the farm to go up for that guy in the top 5 and missing, that's what gets you fired.
Regardless of who it is (Penix, Nix, Pratt, Rattler), I just can't see burning even a top 60-75 pick on a guy that you just aren't in LOVE with. Take a swing into the top 5 if the guy you LOVE is there and you can get him, if not, readjust, fill other holes, see what you can do with Darnold and re-evaluate next February.