He's got Igbinosun too high I think, I'd take Muhammad before him, who he has in that lower group. Also I think Johnson is better than 8th in this corner group in his overall game, however these guys are going to shuffle significantly as the 40 times roll in because there's a lot of depth with different strengths. I have no idea what Johnson runs, but five years from now I'll be surprised if he's not a top 3 corner from this class.
Also Johnson had a strong Senior Bowl week. Only concern I had with him that week is it felt like he was dipping out a bit in the drills. There's more reps for some of the others, which I think is a nod to them. Though maybe that's just the editing of the vids I watched on a couple of the days. I didn't have time to tune into the live feeds on every day.