Fielding and range aren't that important for a catcher. A bad catcher will only make a few more errors than a good catcher. Their fielding value is 100% loaded into their arm. Their are a lot of teams in OL that use speed in big ballparks as a strategy. They play in the Astrodome / Petco to cancel out opposing power hitters, use deadball era pitchers to further kill opposing power and fill their lineups with speedsters like Dilone, Castillo, Henderson, Coleman, McGee, Jefferies, etc. Good arm is very valuable at catcher. I'm on a 2010 Posey kick right now, using AAA to make up for lack of PA's