Ramsey and Hargraves were never going to fall that year to the Steelers. Apple and Jackson were the next 2 best and Eli Apple was really a 1 year wonder at OSU. Personally, I thought that Xavien Howard, Mackensie Alexander, Kyle Fuller and Cyrus Jones were better CB's than Burns, but I think Howard was the only one that really projected to a boundary CB and the other guys were slot CB's I belive.
Burns is a Steeler and I like his attitude of working to get better, I only hope he keeps progressing and somehow embraces some technique and maybe an offseason with Joe Haden helps that further. The draft year he was a guy with straight line speed, long arms and sticky hands, but had no real good technique, stiff hips and clunky change of direction. He also showed he liked to look at the QB , so he could gamble for picks, so a lot to work on.
Haden is a pro, with good technique and I hope he is back. Sutton I watched and he has good technique and that technique allows him to be around the WR to challenge the pass for a breakup. He also shows some good awareness and understanding of routes and how WR's set them up. I like his game, but am not sure if he is a guy that is thought of to play boundary CB.