My guess is, if he is going back behind the plate, he will be in AAA getting his legs back and continuing his development defensively There in 2017. Especially if Vaz and Leon are doing well. It looked as if Blake was going through a bit of a adjustment with the bat with MLB pitching, but I think he will be ok there. He had work to do on defense before he was forced into the MLB lineup due to a rash of catching injuries.. after having surgery, then recovery time, getting back into baseball and catching shape might take a little bit. Theyre not going to thrust him right in as the starter next year. His value isnt great right now, so a trade would be selling low on him. He needs to prove to Gms that he can be at least a decent defensive catcher, which hes not rght now. Theres no OF spot as it stands right now, so the Sox best bet is to get him up to speed defensively so his value goes back up. At least then you have more choices. Who knows, Maybe theres a GM that still values him highly and is willing to take the chance on him being a decent backstop with a good stick. Enough to give up some good pitching.
As they always say, things will work themselves out...