So after the release of wrath i quit wow just before Ulduar. I had alot of rl stuff going on at the time but now that it's all sorted im looking to start playing again.

I used to play a H palla in pve and pvp and i just wanted to know if there were any major changes. I know sacred shield is different, but im not too bothered about the pve perspective of it. What major changes have been made to holy paladin pvp(arena specifically). How does aura mastery work, and are the comps for 2v2/3v3 the same?

Is full deadly gear a bit dated now? or still viable but needs a bit of upgrading.