Failed draft class? That was actually a really nice haul. The fact a lot of them aren't on the team is because other teams coveted the picks and signed them away.

Jones was decent, not really good. Not a bust, but wouldn't make the pick again. He gets us a 5th round comp pick.
Lacy was a good part of the offense. On the verge of eating himself out of the league. He still gets us a 5th round comp pick.
Bakhtiari is perhaps the best pass-blocking LT in the league.
Tretter was a good center and a versatile backup. His departure is a bit of a bummer, but he gets us a 5th round comp pick.
Franklin was a promising RB but he suffered a career ending neck injury. This is the NFL, shit happens.
Hyde was a great pick. He provided depth and was able to play both from the slot and at safety. He left us, but again... 5th round comp pick.
Josh Boyd never amounted to much. Wouldn't pick again.
Nate Palmer was a bust as an edge rusher. They tried to convert him to an interior guy. No success there either.
Charles Johnson was a great pick. We lost the appeal to the league to keep him on the roster and he ended up on the Vikings. He's a serviceable receiver for them.
Dorsey never became an NFL player. Wouldn't pick again.
Barrington was an awesome 7th round pick. Got some starter play from him, even if he wasn't particularly good.