I mean, at this point it seems like Vaz is going to give you between -.5 WAR in a down year and +1.5 WAR in a good year. On average, you can probably expect him to be replacement level to slightly above, with a bit of an injury history. Given how few truly good, everyday catchers there are in the league, that has some value, but he's also unlikely to get a contract somewhere else that really makes other teams sorry that they signed him. He is a player you sign in order to not have a massive problem at catcher for a year or two, but not one that you sign to make the position a strength of the team, or someone you worry about blocking a prospect with. I'm fine with him staying with the Sox for a while, but the days of dreaming on him are mostly over for me, and that's ok.