The more I look at this guy's game tape, the more I think he may be able to play some. He's about as fast as Zeke is now, so maybe he's not too slow after all. Remember, Jerry Rice only ran a 4.7 as well. Same for Terrell Davis. Malik sort of looks like a Terrell Davis kind of player. One cut, then hits it. Great vision.
I actually see something in Shampklin, as a 3rd change of pace back. For his size, he blocks pretty well and plays smart. I saw him block a defender, and then run a route to complete a really nice reception and then get some YAC. Lacks size, but has an above average RAS.
Like you, I also like Dowdle. Hits the hole fast.