FDCL does not seem to proc from SW:P ticks currently, so the proc rate might become a lot higher if/when that gets fixed. As for Mindbender, I'm not sure why Blizzard seems to think giving priests inordinately long cooldown spells constitutes as "fun". Void Shift being bumped to 6 minutes, the 4 minutes on ShadowBenderMindFiend thing. Granted Mind Flay reduces the cooldown on that but given how clunky the rotation is right now I don't find myself flaying very much.
Didn't they remove Sin and Punishment in beta? I can't see any refference to it in the skill book (it may be a bug in the database)