Players like A.J. Jenkins would keep me up at night if I were in charge of a draft. Some players have all of the things you can measure but for whatever reason it never works out. Some players like Josh Reed and Troy Edwards were unstoppable in college but just average in the pros.
Playing WR in the NFL is difficult. The playbook is more complicated, the speed of the game is much faster, and some of the best athletes in the world are hounding you every single down. Corners have always been fast but now a lot of them are fast and big. It makes what MT is doing all the more impressive.
But as far as physical attributes go some of it has to do with the particular offense a team is running. Some players like a MT or Antonio Brown are transcendent talents that would excel in any scheme but some players like a
SP seems to be looking for big bodied WRs who can make plays in traffic. If they can get some YAC then great but hands first.