Well, context never hurts. 26th overall pick, freak injury rookie year, yet to have a training camp, and was brought along slowly behind Steve smith, mike Wallace, and Dennis Pitta who all had good seasons. I'd say what he did given the situation was pretty good.
Hell after one season Landon Collins looked like he was gonna be a middle of the pack totally average safety, his year 2 leap was massive and probably unexpected by most. Perriman in year one flashed plenty for us to feel like it's gonna turn out to be a good pick. Some draft picks just don't pan out right away, it doesn't make them busts