To tell the truth, i don't see the problem with the current amount of damage Ret's are doing in Pvp, sure we rarely top the charts but we're never at the bottom either, i think the main issue that needs to be addressed is survivability, between wings, guardian, and Holy Avenger i almost always have a CD to pop in fights, and then when the cooldowns line up i can pop them together for the insane pally burst. What i think we need to see is a buff to Sacred shield, nothing game changing, but something to give us a fighting chance to survive initial burst when our bubble or trinket is down, i mean, take mages for example, they have frost armour, blink and ice block, plus a trinket or racial to survive burst, Paladins have bubble or a trinket/racial, with a buff to sacred shield i think it would even us up with other classes in survivability .
I like the idea of a gap closer like warriors have (charge or Heroic leap) which can both be used as a quick escape to combat as well, something pallies don't have. Although i have found that HoF and the speed of light talent when used together can essentially do the job, but i don't like the idea of having to waste a talent for an easy to use escape. (not that the other talents in that tier are anything special).
All in all in my opinion i think the paladin class isn't too bad damage wise, all we need is some extra survivability, in saying this though i'm speaking from a strictly Pvp perspective.
And of course, they really need to fix the AI on guardian... he's just so silly atm.