As one of the resident Packers fans in purple land, I'll venture into this one until Raptorman comes around. If I remember some of the camp reports, there was real frustration that Cordarrelle was still struggling to learn the playbook, couldn't run routes (related), and Zimmer said that he is still inconsistent in both practice and games. I think he scored an 11 on the wonderlick, so still a few ticks above Moss but nothing to brag about.
If another team can get him for a very low round pick or conditional, it could be a good move. I'm just not sure that the kid is motivated to reach his potential.