its kinda hard to get back those prime years if you're a guy like Vilma. Its a hard choice for him.
if he was out of his prime, I'd refuse this and become a martyr if you can prove Goodell for his abuse of power and defamation.
However, he is in his prime and he should look for every chance to get out on the field to maximize his earning potential as a player. Your prime years in the NFL are very short on average.