You may be right Oldtimer. Unfortunately, Swihart has never received consistent enough playing time in the majors for us to know whether he is good enough to share duties with Vaz. Counting on Swihart to catch roughly 40% of our games is a big risk, IMO. And I don't think it's a good idea to give Vazquez more catching time than 60% that due to wear and tear.
Or maybe I'm just really fond of the Vaz/Leon tandem.