Just to clarify for readers:
I'm not really concerned about the site's rankings.
I'm actually more concerned about the drop in clicks since Google picked my title and the site's branding that's removed when Google changes the title. <-- That's the point of this thread; not the rankings.
I built the site for the visitors, not Google, and I'm not going to change the site for Google, but I might change the title Google gets ... The actual title on the home page is not likely to change.