I only know what I see on the field of play, and I couldn't be happier that Vaz is gone. In the Sox best season ever, 2018, Vaz's WAR was -0.8. Before and after that season he loved to run into outs on the base paths, and I do not think he was effective behind the plate.
Right now Wong is clearly a better defensive catcher than Vaz and McGuire is a better hitter. Together, with Wong starting most of the games, they are competent and a freaking bargain.