Selfless healer could be nerfed by some amount, don't disagree with that. Throwing a 180k crit heal in Dreadful gear is not so balanced. But nerfing Ret self-healing would be a bit over the top IMO. WoG for me heals about 30-35k, BUT it's a huge trade-off in damage. Without TV Ret won't be doing anything. Unless you a lot of lucky crits you won't even break a mage or priest bubble throwing those wet noodle Crusader Strikes and Judgements plus 15 sec CD Exorsicm.
Those self-heals are about the only survivability we got. Yes we have bubble, but after it's forced bye bye Ret pala was nice to see you. We trade huge damage for our heals and I think it's fine as it is. I think if it gets nerfed Ret will go from balanced to slightly underpowered. A Ret who spends his Holy Power for WoG won't be doing any pressure at all.