To me it looks like the whole Holy Paladin sort of thing from wow, where every expansion Blizzard desperately try to push poor old hpally into the front line by altering this and nerfing that. And when they fail it it, every expansion, they roll it back to the changes.
People just love the whole concept of armored defensive-ish back/middle line healer that laughs at the enemy attempts to damage him/her and drop the class once they are forced to frontline/melee.
Yes, Salvation/Rites sound especially cheesy with their heavier armor, aoe cleanse/detaunt, second resource but there are downsides to them as well, like no way to benefit and scale past the 8rf book/chalice, lack of single target burst healing, barely any ranged CC (aside of the damned Celerity slow).
Mythic in the original game stated that the wanted healers to do substantial damage as it is reflected in the healers having more dps trees than the healing ones. But I'm yet to encounter an MMO where this idea was done right, without producing armies of never-dying healer-mdps/rdps solo players, that are able to kite around forever, and viable in group play when their leech attacks are avoidable/mitigated/stuck in CC.
My idea is to leave one tree to be a utility-type of tree. Focus on first tree being backline healer, the other a mdps-hybrid. So that leaves some mastery points to spend in, for example, Grace.