I think it's jumping the gun to say Campbell has the floor of a plus guard. First, he's never played the position. Beyond that, he has an extremely high stance that he'll have to completely rework transitioning to guard. Could he transition well? Sure, but it's a huge question mark. Not all OTs could just become good guards and you see examples of it failing all the time. Keep coming back to it, but Peter Skoronski is a prime example and is basically the Will Campbell of this draft. Although again, I think Skoronski had better tape, technique, and was the better prospect overall.
I do agree it's 100% a weird draft. I want to trade down but I don't know why any team would trade up. Walker is an interesting evaluation because he's more of an undersized tweener. Those guys are risky...I don't have a concrete opinion on him one way or the other. Although, if I had to pick a defensive player at 10, and Graham were gone, I'd probably pick Mike Green.