Exactly what I was about to say. We have to consider how much of this is him motivated for a new contract. If it's about the $$$ he could turn back into a turd once he has the cash. Here are three examples from the coaching staffs beloved Cowboys:
Anthony Spencer
Miles Austin
Michael Jenkins
Your examples don't work. Anthony Spencer and Michael Jenkins are both on their original rookie contracts, so they haven't reverted back to anything. Miles Austin got his big contract, but his production this year has been hampered more by the Tony Romo injury and the implosion of that team, not by his money. In fact you could argue that Miles Austin never was a turd, so how can he revert back ?