The problem is that by and large the Sox are horrible at trading for pitchers--some of which, I hasten to add, is because pitchers are unreliable. To me dumping Sale and going after Giolito are perfect examples of how stupid the Sox front office is. Right now the Sox are committed to paying Sale $17M and Giolito $38M--a total of $55M--for which the return will be miniscule.
I hasten to add that so far the return on Story and Yoshida is about as bad. Big bucks for tiny contributions to the team on the field of play.