These are excellent points. For anyone interested in a film breakdown of at least on of Perriman's games, I recommend checking out Matt Waldman's YouTube channel. He did an RSP film room on Perriman recently. He and his guest made many of these same comments. I watched 5 games of Perriman (2013 Louisville; 2014 ECU, BYU, NC St & Penn St) on draftbreakdown and YouTube. In addition to the issues you identified, I noticed he was not targeted much in the red zone. This could've been by design or dictated by coverage, but if you're the top WR on your team, wouldn't they look for you more in the RZ? He has the size to be a good blocker, and does show an ability to mirror and wall off his man, but didn't show a desire to want to dominate his guy. Also, in open field situations when another player had the ball, he didn't seem eager to look for someone to block to help spring his teammates. This is probably not uncommon for college WRs, many are not asked to block very much. On a positive note, he did make big catches to jumpstart his team when they were down. The 2013 game vs Louisville and 2014 vs PSU stand out in that regard. Both catches were on deep routes. I'd say he has build up speed, not necessarily explosive speed. If he gets a free release, he can get deep I a hurry. But I don't think he has as much short area lateral explosiveness. Didn't consistently show 4.2 speed in he games I watched, but he's plenty fast. Once he learns to sink his hips more consistently when making a break, he should be very difficult to stop on comebacks and in breaking routes.