Quelaag's Furysword and changing my build

Hello everyone. I'm 55th level, enjoying a full faith build using a divine claymore, and enjoying a lot of co-op play as a sunbro as I traverse through the game. My endgame build was planned to look like this:

http://mmdks.com/1kug

Just got the lordvessel and right now there is where I am at: http://mmdks.com/1kus

Then something strange happened. I got the Quelaag's Furysword, raised it to +5, and now in love with it. So much to the point were I'm now considering changing my build to be more of a faith / dex build:

http://mmdks.com/1kuq

Where I would switch out divine, +15 uni, and fury's sword as needed.

Thoughts? How do faith / dex builds fair? And if I move in that direction, do I start raising dex now or wait until after the first playthrough?

Faith/Dex builds can be very versatile in PvE and PvP, but just remember that Quelaags FS scales with humanity.. Therefore there are many weapons more powerful than it if you have 0 or 1 soft humanity. If it were ME, I would raise Dex early because that's the more important part of the build. Your damage with your furysword and other weapons outweigh the faith weapons. The furysword will be doing more damage, anyway.