My personal opinion on Damian Williams, and Richard should get every opportunity to pipe up about why he likes him, but I think that he's not near physical enough. He uses his hands and body well to get beyond the bump in space and present himself as an option for the QB. But he doesn't come back to the ball well, doesn't attack the ball in the air. He's passive, he lets the ball come to him and cups it instead of grabbing it, often letting it into his body when it's not necessary. He has no strength or leg drive. He may be a sneaky blocker because he plays through the whistle, but he's not in any way an effective one. He reminds me of a version of Mardy Gilyard that actually tries hard, when it comes to blocking. I don't know that he can get off the jam at the line, he's better with the bump in space. His upper and lower body are not well coordinated for making cuts on the move, you often see him stumble a little bit and get caught up when he has to make cuts at speed. He doesn't have the vertical speed to get open that way against man coverage. He doesn't burst out of his halt on his arrow routes.
What you have is a guy that can find spaces in zone and run through traffic well, can present himself to the QB as a target, passively accept an uncontested ball, and who has eyes in the back of his head when running with the ball in space. Whenever Keith Box talks about WRs being a "dime a dozen" he may misguidedly be attributing that to guys like Dez Bryant, but for me it's very true about Damian Williams. I don't know if you can get a guy to get tougher, more physical, attack the ball more, etc. Maybe you can and he can grow from being what he is now to being so much more...but I tend to doubt it, and you can say that about a lot of guys.