I criticise him because I don't think he's very good...undisciplined, unfit, injury prone, mainly because he's unfit, generally a poor decision maker with unreliable disposal , capable of good disposal yes, (two best passes by foot I've seen in recent years were both by him.) but it's few far between and has some decent evasive skills, goes hard and tackles ok but that's about it and no more than what you could get from 4th rounder or a the kind of very good state leaguer you occassionally find with rookie picks....that he cost a first round pick at the expense of far superior & better performed players just happens to be the kicker to all that.
Could he improve and get over his injury problems? Dunno, maybe, I guess, but unless he absolutely stands out for the remainder of the season, I'm not willing to hang onto him forever or until he's worth absolutely nothing just to find out.