Not really, because those numbers are not equal and you know it. The damage reduced by PW:B and AM are considerably less than the healing done by revival and tranq. Not to mention all of it is encounter dependent, anyway.
Hence this is really just going to be a pissing match if you compare CD's as such, and thankfully, Blizzard doesn't seem to have bought into that argument.
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Absolutely not, because that's unduly harsh on lower geared players and on CM players (where Paladin is already very weak as a healer) while not as impacting for better geared players.
If anything, it should have been Holy Light and Flash of Light that received higher mana costs. That and the Archimonde trinket should not have been made as strong as it is.
I actually agree with "some" of your points with regard to balance, to an extent, but I think you would come off a bit more convincing if most of your post content didn't read like it was abject whining about a class, in that class forum, about how they "take your raid spot" or are "too OP" or whatever.
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I'm still surprised Beacon of Faith hasn't been totally erased, which erases some of my Faith in upcoming class design and balance.
The problem isn't even lack of AoE healing, it's just lack of a meaningful spell toolkit. This is actually why I liked Holy Power, it gave the toolkit an extra dimension - even if there still weren't that many of them. For instance, I think it's actually fine that Holy Radiance is gone (though maybe the old, Cataclysm pre-4.3 version could be fine if it were reintroduced). But losing WoG means that a pretty meaningful spot-raid heal is missing, and I wouldn't quite call LotM a good replacement for it.