Re RDM: They screwed it up by making its cap higher not lower. So it ceased to be that level of gameplay. ShB RDM > EW RDM. So with that seat vacated, they filled it with SMN.
Vanilla WoW was a mess, I think more BC and Wrath, personally. The difference is there was a lot of GCD healing.
Even so, all healers, even Holy Paladin, had a more expansive kit than this joke of a BLU "proposal" that we all know isn't happening since SE isn't going to lock BLU to any roles or static builds or put in current content. You'd have to add a new Job to the game. This is one thing about Ty's proposals going back to the brewhaha over CNJ, they all are designed so he doesn't give up anything. He doesn't have BLU as a healer know (in max level content) and knows he won't, so has written it off and is okay with giving it to the plebs. Same with CNJ back when that discussion happened. As proven by me suggesting adding a new Job, and no matter the Job I suggested for "the simple one" - Druid, Shaman, Chemist, etc - he opposed the idea since he didn't want something he might want to play to not be his level of complexity.
That was why I said it was selfish since it's rooted in a desire to have everything and not give up anything, and his other proposals like this one - in addition to being an absolute joke, even he can't have intended this seriously - is based on not giving up anything other than what he's already written off as either not wanting or never getting.
It's one thing to want old versions of Jobs back, but it's quite another to resist even a new one being added to appeal to the people not like you.
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And I'm not even going to deign to address your "fraction of the effort" BS other than to say, yet again: You're wrong and insulting. Be better.
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The simple answer, btw, would be to take WHM, trade the oGCD heals for GCD healing throughput, and leverage Misery for damage neutrality. This BLU "proposal" doesn't do that.
Again, the issue here is a total lack of understanding what people are asking for, and thus a proposal that totally misses the mark. And insulting/disparaging isn't understanding.
In life, sometimes you have to realize that other people think and believe things differently than you. AND, as much as you may think you understand them, you often don't. And when you tell them what you think they think, that's rude. When you ask "Is this what you think?", and they say no, then it's offensive to keep insisting "Yes it is", and leads to animosity and inability to reach consensus since you're basing your bargaining on a lie.
"Oh, you won't take 1 million dollars for your daughter? How about 3 million?"
"What you seem not to be understanding, sir, is that my daughter is not for sale at any price."
"Oh, you drive a hard bargain. So, 5 million, then? You do just want money, right?"