My game files are too big to upload, but zealous focus is no longer affecting to my party members despite them being next to my paladin well within the AoE. This was not an issue before I did Readric's Keep. From some googling around, it seems the opposite is also true (range being too big):
http://forums.obsidian.net/topic/75380-bug-range-of-zealous-focus-aura-is-bugged/