Originally Posted by
Kalisandra
It's not how healing used to work. In BC healing used to be more deliberate (aside from tank healing in some fights, which could get crazy), and it was about letting people get low if you needed to, but not letting them die, because you really needed to save mana. So you'd let them get low as you cast efficient heals into them and kept them alive and then slow brought them back up - assuming you timed it right. In Wrath it was different again, and you were spamming heals like crazy, and it was about knowing how many inefficient heals you could mix in without going OOM in the fight, and healing assignments were important because if two healers hit the same target someone else was probably dead because they didn't get a heal. I loved it, Blizzard's devs did not. Since then it's seemed that healing is a bit of a mess - the devs were talking about going back to BC's model, but they never got it right, not least because they can't resist the temptation to make every high damage phase fatal if you don't enter it at 100% health and get serious heals throughout. Also, having a bunch of specs with solid self-healing (especially at no cost, like Fury) doesn't work with this model.
The net result is that I think we won't see fights where Shamans' mastery really works. So I think you're right and does need to change, though I like it conceptually. What to replace it with though? Having suffered with the Paladin mastery (must be grouped, so to start with there aren't a lot of grouped fights, want to be in melee, but some effects treat you as ranged, ugh), I don't trust the devs to come up with something that's effective, somewhat interesting, and not gimmicky.
Shaman's crit system is how Holy Paladins used to work, and boy did that get abused in Wrath (which is why it's a relatively minor effect for Retso). With enough Crit and the right Libram (which everyone used from one end of the expansion to the other) you could get your Holy Light cost down to half (and it was the big heal back then), until they nerfed hell out of the mana return. Stack Crit and Haste, and spam Holy Light all raid, every raid.