@Kaphik

Selfless Healer is a Ret talent. Basically, you get a damage bonus for healing someone else with your Word of Glory. There's a few problems in it, though:

-The heal is rather meager, even with the 50% bonus to healing in the talent
-Word of Glory is getting a longer cooldown, making it something you can only use occasionally anyhow
-Using this means you give up using your biggest damage strike (Templar's Verdict). The damage bonus you get in exchange (12%) just doesn't cover the loss, not even close.

All of that together makes Selfless Healer a rather uninspiring talent. Increasing the duration of the damage bonus made it more attractive, but apparently it was not working out as intended.

This wouldn't be that much of an issue if Ret was blazing up the damage meters, but my understanding is that, on the whole, Ret is towards the back of the pack in terms of damage. Giving up DPS to throw out a few spot heals during an encounter, while an excellent utility, is not an especially sought-after feature. Nobody expects the ranged DPS to go off in a corner and bandage themselves during a fight, right?