Well, last year we could all see that Lavarnway was totally screwed up at the plate. I ascribed it to be being weighed down with a lot of coaching on the D side, and maybe too much self pressure on the O.
Now, in a quiet manner, his D is solid (a bit weak on the far edge of what can be hoped for catching pops, and a bit much on the PB (AAA stats this year), but he seems more relaxed at the plate, taking walks, going opo when he should, seems to be going for contact more than power. Even if he turns out to be a lower SLG hitter than Salty (say -.025), if he is a +.025 better OBP hitter, he'll clearly be a better hitter than Salty. At this point he already seems to be better defensive catcher than Salty - pretty good since Salty has 820 career games at catcher as a pro and Salty has 348.
The rest of the year will probably keep going as it is. Salty getting most of the games. Maybe Salty getting a few more games off - day games after day game type thing to keep him fresh.
I think Lavarnway/Ross next year would be a good tandem as Salty gets his one "big" sized contract. I would not trade Salty now unless we go through a 8-22 stretch and fall out.