I don't see this team spending the money to pay Umberger not to play, just to go out and pay someone else to fill the spot, we are not the Flyer's. What I could see is the FO asking Umberger during his exit interview for a list of teams he would be willing to play for in a trade. This FO has no ties to him and has allowed him to be scratched multiple times, with the change in his NTC Jarmo could trade him at the draft for whatever he could get.
I agree, its not like he's Gomez bad. He had a few bad stretches this season (also leads the team PP goals), but unless you can move him in a beneficial trade, you have to bring him back.