If the Jays signed Everth Cabrera, and he put up a 3 WAR in 2015, do you keep him or trade him the following winter? If you keep him, then I completely disagree with you. Players like that, you get whatever value you can, and then cut bait. I'm not even using hindsight. I wanted the Jays to trade Rasmus last winter, and I was fully on board with the Lawrie+prospects for Donaldson swap that the Moogster suggested prior to the off-season (still can't believe it actually happened).
Like I said, it's not always the case, as some times players just need a change of scenary, but in the case of the players AA acquired for 50 cents on the dollar....there were clearly reasons they were available for that cheap. And we're seeing why. You don't count on them. You get value, and then sell high.