Here is the deal with shockadin basically:
The build was a hybrid class, who could heal nearly anything, solo, and be used strategically in PVP as damage; even after s1.
In pve raids, shockadin dps was impossible because the mana was gone way to fast and they pulled aggro worse than a boomkin. However in 5 mans I always destroyed anyone, including tier 6 geared dps, in overal damage when I was specced shock assuming the tank wasn't a scrub and the group wasn't ccing 4 of the 5 mobs in a pull. Concecrate did that much damage.
However, the destruction of seal of righteousness, the removal of sanctity aura, the attack power spell damage talent, and the buffs to made to Ret in the heal and spell damage department basically killed the shockadin for good. Basically what happened is the two were merged. Ret now can heal and have the versatility of a shockadin, use of concecrate, and has a judgement (martyr for alliance now) that hits for big numbers like seal of righteousness did.
Petty much blizzard had the Ret paladin the way it was supposed to be all along, just had it split between two specs, Shock and Ret. Now the two have been merged, each applying their strength to the other, creating the Ret paladin the way it was always meant to be, a versatile dps who can fill multiple utility roles in many situations. Just too bad holy shock and crusader strike are just out of each other's reach. :-P
Thanks for your time.