Answer to OP question: No, I doubt it.
I agree that Umberger and Wiz are overpaid. However, Umberger is owed 18.6 million 2013-14 and afterwards. There's no way McConnell pays him 12 million to go play on another team. For Wiz it would be even more. Just got to suck it up and hope those two can bring it.
Also, I'd rather have Boll spot in for duty on the 4th line for 1 year at 1 million than to pay him 600 K to sit at home. From all accounts, he's a consummate team player and unlikely to be a cancer even if he spends some time in the press box to make way for the young'uns if need be.
The clause is tailor-made for contracts like Gomez and Redden (short contract remaining, big cap hit, non-contributing players) that are on big-market (profitable) teams.