James Jones has more passing down snaps than anyone you listed. He's got multiple games worth of snaps over his peers on the Packers roster(120+ on Nelson and 220+ on Cobbs). It's not as if he isn't being thrown the ball, either. He's got one less target than Jordy Nelson, and there are a lot of much more productive players than Jones with the amount he's thrown at. He's a poster child for someone who has been promoted past his level of competence.