What strikes me is the completeness of his game.
He gets off the line of scrimmage well, he cuts well on the run, he was pretty precise with those switch routes and route combinations they run in that offense, showing a lot of awareness of the other receiver and of route depth. He runs his routes with awareness of DB leverage. He was coached by a former NFL wide receiver who is now the WR Coach of the Green Bay Packers. This was not "three-route" stuff like you see with D.K. Metcalf and others. He ran routes he will run in the NFL.
His hands are good. It's not like Ricardo Louis for example, who is always catching the football at the wrist and double clutching everything. I see some drops tallied on his season totals. I've watched 9 of his games and I can't for the life of me think that I've seen anywhere close to 10 drops but OK whatever. His catching technique is good, his eyes are good, and the guy regularly makes plays on the ball in 50/50 situations. Don't know what more you could ask.
I think he's shown his top-end speed on the football field, but he also showed it with his flying twenty at the pro day. That's one thing I don't think the NFL scouts are seeing. He was lasered from the 20 yard split to the 40 yard split in 1.84 seconds. The only guys that did it significantly faster this year are guys you'd expect, like Gary Jennings, Terry McLaurin, Mecole Hardman, Darius Slayton, Parris Campbell, D.K. Metcalf, Emanuel Hall. I mean, duh. The point is only one of those guys runs taller than 6'2" and that guy was pushed up to the top of the draft primarily on the basis of that size/speed combo.
People will try and talk to me about the 10 yard split and I don't care like they do. The track start isn't a football move for a wide receiver in the first place. But the real problem is the track start is subject to misinterpretation by the guy in charge of starting the laser timer, and it's also subject to frivolous technical screw-ups by the player himself. He could end up with a poor time because he lifted his arm up off the ground before he really exploded with his feet, or because he rocked forward before he exploded. Both of those technical mistakes will result in the timer starting too early, adding a tenth or even two-tenths of a second. But notice I haven't described a single thing that actually matters on a football field.
So he's got rare top-end/height combo. He's got good hands. He's been trained on NFL routes and runs them well. He's got natural skills in route running. He gets off the line and off the press. He blocks really well. He transitions beautifully to run after catch and is hard to bring down, as Slimm detailed. As I said, there's a completeness to him as a prospect that is very attractive. That's not to say he's got elite level overall talent. It just means there aren't many if any glaring holes in his game.
It really IS the pro day and the character stuff weighing him down. And those are significant concerns, particularly if work ethic was an issue with the poor pro day results.