The answer, in one snippet, for the TLDR folks:
He has hit 45% fewer fly balls in 2014 compared to 2013 (when he had a ridiculously high flyball rate combioned with a ridiculously low popup rate)
We've really never had one except maybe Molina?
Navarro, Arencibia, Borders, Knorr, Myers (was decent IIRC) Zaun all bad to so-so. You gotta go a long ways back otherwise.