No when we let Victor Martinez walk is when we lost our catcher, and that was because Theo was invested in his reclamation project Salty. Don't get me wrong Salty was a great grab, and can work as a day to day catcher but the Red Sox need a force behind the plate and that was Martinez.
Lavarnway looks like a descent catcher, and a stellar bat. I think Shoppach was brought in mainly to teach Lavarnway and Salty how to throw out runners. They will let Lavarnway sit on the active roster as part-time DH and insurance against Ortiz's slowing bat, and allow Bobby V to sit Papi when he is too tired to run out fly balls.
I personally think that one of the more important aspects of this year will be if Lucciano and Cherington can convince Varitek to come on as a catcher's/Pitcher's coach. If he really wants to come back as a player I am willing to bet he is wearing a cubs uniform next year, Theo will pay his salary just to mentor his pitchers. Bringing 'Tek on as a coach allows us to not waste his salary towards the luxury cutoff, and instead bring in someone like Edwin Jackson or Joe Saunders.
Let me ask everyone, what is the potential they try and teach Lavarnway how to field in Right? I know most Catchers goto 1B when their knees are shot, but how about moving him to the fence before his knees blow out. Or is he just too much of a liability out there, similar to if they moved Crawford over there?