Sabathia is Brewers property. Hank should have ponied up the prospects needed for Sabathia to ensure he got the full princely treatment he deserved if he didn't want a team using him for the purpose they want. Would I want him pitched like that if I were to sign him? No. But the Brewers ponied up a nice little haul for a guy they knew they wouldn't resign and they can use him as they see fit. The ONLY people who should have a problem with this are Sabathia and his agents, all else do not matter.
The Brewers did not trade for him so that he would be a New York Yankee ace nor did they do it to boost his value on the FA market. I am not saying the Yankees interests or Sabathia's interests do not matter, but the Brewers are the boss right now like it or not.