The only people concerned/disliking this new (old?) path are bad/lazy healers. Real, accomplished healers are looking forward to the game being interesting again.
I play all five specs, holy priest being the most fun and engaging tree in 4.0 to my taste. I love these changes, because it shifts the challenge from "how fast is your internet connection?", to "how intelligently can you react to what's going on?" Hypothetically, anyway. ICC is still whack-a-mole, but we'll see what happens next week.As for getting chewed out by non-healers, my experience is like Hiwa says. Mostly I get silence or compliments. Sometimes, I get questions when I'm fiddling around with an unorthodox spec and still doing pretty well. I only ever really got yelled at by bad tanks that were plainly, obviously bad. That doesn't bother me at all. It's like those players who wish they could beat you in PvP, but can't, so instead they follow you around spamming /spit. It's kind of amusing.Tip for healers who started in Wrath - practice drinking. It's a real skill that should not be overlooked. You can start drinking as soon as you're OOC, and if you're doing it right, you can usually continue to drink in the first seconds of combat without too much worry. Practice moving to the right spot at the end of a pull, HoT/PoM/ES/Bubble the tank, and mash your drink button. Keep a large supply of the best water for your level. Innkeepers currently sell Sparkling Oasis Water for level 80s.