Word of glory and rebuke added some awesome utility for group play, though it came riddled with nerfs.
Ret is too much of a glass cannon, and if a target can survive the burst it's over. That and for how many classes that can now nullify some or all of paladins best defensive and offensive mechanisms (wings, bubble, freedom, hoj)- all it takes is one of those classes to be nearby to make a ret paladin no more useful than any other class.
A ret paladin does not bring anything to the pvp table prot ret can't. And prot ret has better survivability. This makes prot ret fill the description "defensive melee hybrid"
Holy is basically the only pure form left of paladin, as it retained cleanse and has a clear definition. "a healer in plate with cleanse"
Ret paladins in pvp might best be described as "Defensive melee arcane mage". If wings isn't up you don't even have a chance to begin with. By the time you generate 3 holy power vs anyone who has a clue how to play you're almost dead and either need to tv and bubble or word of glory and spam FoL. Running around a in a group pvp scenario with a 2 hander and blatant melee and holy power requirements leaves you fairly defenseless as is, but as I said early just one of any of those classes who can remove your ultimate defensive cooldown- bubble, purge, dispel, or even steal your ultimate dps cooldown (wings), you're out there running around like a chicken with its head cut off for a few seconds before a caster or two kills you while you try and close the gap distance.
Ret brings nothing to the table of pvp which other specs of paladin can't as good or better.
I'm going to retire my paladin as ret, and as my main and sell out and spec holy and prot ret at 85...and..
I'm going to finish leveling up my mage as fire (extremely fun) and go frost for high end pvp at 85 and dual spec Fire Hero as my new main.