Personally, I would give Sanchez one more start. He looked better, more comfortable, last night and pitched well enough to win honestly. But if he blows chunks, he should be demoted and asked to focus on location. When is Santana going to be ready? Will he be ready? I think he has an opt-out clause at the end of April if he's not on the team. If he looks decent at all, and is ready, I'd love for him to get a chance. Letting Sanchez mature a bit in AAA.
Also, I'd pick up Dickey's option for shizzle. And I might also try to re-sign MB. Signing both might seem crazy, but it might allow the FO to trade a blue chip prospect (like Sanchez) for someone who can make a real impact in 2016 and beyond.
But like others have mentioned, there are a ton of SP FA's this year. I just really like Dickey and MB.