I can't believe this is still going LOL. But I'll drop my thoughts since I'm guessing it'll go a few more pages. I don't think Winston will 'bust' but I don't think he'll be great or even good for a few reasons:
1) Lack of discipline
2) Glaring lack of athleticism
3) Throws it up for grabs a lot.
4) Long, slow release.
On the lack of discipline, he showed up at the combine around 230 ish. And that was after he said he lost nearly 30 pounds pre-combine. So he was hovering around 260 before then. Even now he still has that skinny fat physique going. It's like you're already under all this scrutiny, you know you have to workout for teams, and you let yourself balloon up in weight like that? What does that say about his work ethic or discipline? That would rub me the wrong way if I were a GM. It says to me you're already somewhat lazy in the offseason now and you're broke, what type of work will you put in once you have a few million guaranteed?
2) Athletically, it just isn't there. Now I know what people are gonna say...he's a pocket QB so it doesn't matter. Buuut, kinda does. If you look at the trend in the NFL right now, even the pocket guys like Luck ran a 4.6 and was one of the best athletes at the combine. Same with a guy like Russell Wilson who is considered a pocket guy by today's standards and he ran a 4.5. You go from Luck to Cam to RGIII to Wilson to Kaepernick and all the new QB's entering the league now are athletic. The reason is because defenses are getting bigger and faster and a pocket guy just doesn't really cut it anymore unless they have an elite football mind. I know everyone is gonna say Peyton Manning or Tom Brady but they were drafted 15 years ago AND despite his apparent football IQ, I haven't seen Winston operate an offense like those guys. The pass rush today just swallows guys with no mobility. And isn't just the 5.03 40-time with Winston either, it's the lack of agility and overall just poor testing in damn near every single athletic test. You can be slow in a straight line if you have excellent feet in the pocket like a Romo, but Winston is very awkward athletically.
3) Winston takes a lot of chances, something I noticed in 13'. He often got away with it then because he had a 6'5, 240 lb. monster to go up and get it. Without Benjamin some of those jump balls turned into INT's. Now it wasn't all him, there were times where the receivers screwed up (Wilson's pick this year comes to mind, Wilson made a great play on the ball but the receiver went up the seam for some reason rather than run the square in allowing Wilson to come underneath). He got away with it against overmatched college defenses but NFL defenses will eat that up.
4. Photo evidence (you noles should like this pic though.)
He takes the ball almost to his hip in his wind up. I can't remember a successful pro QB ever throwing like that. You just give defenses way too much time to jump routes which was an issue I noticed when FSU played us. Our DB's smothered FSU's receivers and part of it was because even when they were open, we were able to close cushion quickly because balls were not coming out on time. We know from his baseball background that he has a strong arm but because of that wind up he has to basically be on a next level anticipating throws for him to throw completions, that's gonna be a problem in the NFL. It's kinda the same issue Tebow had, though Winston's motion isn't near as bad as Tebow's was. But people seem to overlook Winston's motion for some reason. It needs work.
All that said, he's not gonna be bad. I think he'll be one of the top 15-16 QB's in the league. He won't live up to a #1 pick hype if he gets drafted in that spot though IMO.