Okay, so put yourself in Seller's shoes right now. You have 3 options.
1- NFL. What grade would you need to make the jump? 2nd round? 3rd?
2-Stay here. Maybe the OL gets better, maybe the new OC can scheme for you?
3-NIL free agency. Hunt for a team withbabline and some coaches. Make a run next year to raise youre draft grade.
Which do you choose? (I know option 1 is pending info)
Well, as Sellers said, it's something "his people"

will handle.
I think if he found just the right offense in college, he could plug in and be successful. No matter what, he's playing for a new OC in 2026. Here, another school or NFL. A 3rd round would make about $1.5 million/year. I could see him leaving for that, but that's dangerous territory. A projected 3rd round pick could easily slip to 5th round or go undrafted.
If I were him, I'd guess he'd rank his options as you have them listed: NFL, return here, go somewhere else.
I have to wonder what his value is to other college programs right now. They're asking the same questions we are: how much of his stark regression is due to the OL? Do you sink a bunch of NIL money into him for a one year only to find out he's a bust? I don't see any CFP caliber teams pursuing him. Maybe some fringe teams looking to make the jump.
I really don't know what a good answer is.