As for the OP, appreciate the effort. Lord knows, nobody LOVES a long post that is thoughtfully written better than me. HOWEVER, while the OP is a "concern" until I see the pads go on and live action starts, I really think we need to put this to bed. ALL the important posts on BOTH sides of this argument have been raised, defended and countered ad nauseum.
That being said I offer this. What we NEVER really know about any player is what is going on in his head. I mean it was Tom Brady's HEAD that made him into the GOAT over 20 odd seasons. It's the same thing that makes a guy like Jonathan Jones or David Andrews go from an UDFA to respected pros, the mind.
I was an overachiever as a football player. I was a 215lb DT and NT for 3 years in college before I was moved to LB my senior year. I will always remember one play from that time. I was lined up on the INSIDE of the TE in a version of a wide tackle 6, just off the outside eye of the OT. At the snap of the ball I found myself ripping through the TE running down the LOS making the play on the sweep for a short loss. It was a great play, but I remember thinking I had no idea HOW I got outside that block. The easy answer would be instinct. But I found in the 2 years I played after college and the 20 odd that I coached, that "instinct" is the result of practice reps, preparation, focus and mental toughness. It's what allowed a guy like Brady to overcome his MANY physical flaws and turned himself into the QB everyone wanted to be. They guy who knew all the answers to the test. We've been talking about THIS evolution for the last 2 decades, but we never talk about what made a guy like David Andrews go from UDFA into a respected starting C for several seasons on really good teams. What allowed him to him to overcome the physical flaws that caused him to be left undrafted.
So, I have no idea what kind of LT Campbell will become. But I do know that his starting point is being the guy who was the consensus best LT in the draft and had a 3-year career of success against the toughest week to week competition in the land.
And more importantly seems to get A+ grades in all the markers that evaluate the "head" part of the game.
Would it have been better if he'd had a 84" wingspan. Sure, but there have been TONS guys who became great players DESPITE having some physical flaw or another. Guys without some physical flaw or another are REALLY, really rare.
People are making a mistake thinking that Cambell's "wingspan" is a definitive factor in his success or failure. Let's just ALL shut up and let it just playout on the field, with the understanding that he WILL give up some sacks and miss blocks like EVERY OLman does. I will judge him more on what he does AFTER some adversity and how he grows as the season goes on.
He has been gifted with some rare athletic gifts as well as this aforementioned deficit. I hope among those gifts is the "instinct" so see what's happening that half second before everyone else,