That's crazy. I'm not even sure how that is allowed to happen. I could have sworn it was against the rules to trade your aging, couldn't win the big game, QB to a hated division rival. I thought for sure the rule is you need to trade him to a non conference team you don't play who is offering you a worse deal first. Then that player can go to the hated rival the following year AND get to keep their draft picks.
Seems to me like Philly dropped the ball on this one. I should call the commissioner and complain.