It's up there. Rules in CFB are different, you can grab more before the throw. I know squicken mentioned FS/S, but that might be a supply problem. If we look at Alabama for example, their corners have been garbage in the NFL, and they love playing single high press man. Bama Safeties have gone high in the draft, but how much range do they need in the SEC playing against those god awful QBs? Other teams just play a lot of two deep and all its variations, don't need a true center fielder if you're playing that way. Another issue is the tweener, guys that can run are just moved to LB. Thompkins for the Panthers is a good example, running back, to safety, to LB. You need athletes to chase down these shallow crossers. Mark Barron was a guy I thought would be better served playing LB in the NFL, played LB on passing downs, but somehow got in the top ten as a S.
CB is a tough position, some teams coach them up better, but you can say that about other positions as well. Some teams are incapable of putting together offensive lines or WR core, while other have no issue at all. Ronald Darby was smoked all game by Martavis Bryant in preseason, I'm like this kid is done, his confidence looked shot, and teams came out throwing at him because he was an easy target. Darby has been amazing, even when you catch a ball on him you're covered, he's been nuts, but the kid works hard which brings me to my last point. A lot of times we laugh when commentators bring up veteran presence, but you need vets to get the young guys up to speed. Darby has a bunch of proven NFL DBs on the roster to learn from. Contrast that with Watkins, no established vet at WR, no one to really learn from. Another factor why some teams just fail to develop talent, when you have trash around young players they tend to rot as well.
Edit: I thought Daredevil was a great comedy, Netflix has some good ones, intentional or not. Got done with the new Aziz show, hilariously bad, so forced. Maybe I'm getting to old.