1) has been a big disappointment on special teams, was expected to make a big impact there.
2) isn't physical enough to get off the line of scrimmage in a timely fashion when confronted with press coverage. Since this is a must in KG's system, he has struggled to make here.
I know people love the small fast guys, and they do have a place n the league, but in todays league I would devalue any WR who is small and doesn't have a good amount of experience vs press coverage, especially if you have a team that runs timing routes like we do. This year, everyone loves Tavon Austin in the draft and he is a fun guy to watch. But I still have to look at the history of the NFL and note that the league's history of 5'8 170 perennial pro bowl WR's is somewhat short.