Are you seriously angry because they did a change that never even made it to live servers? How was your raid experience ruined this week because of this change?
My raid experience has been so miserable since the start of this expansion that I've been forced to reroll a priest which will soon become my new main. They promised to fix us a short while ago which gave me some hope, but the fact that they're even considering nerfs to us in the form of mana when we're already starved as hell for it really pisses me off. It shows that they're way off-mark with what needs to be done to improve the game and that they don't give a damn how awful it is currently to raid heal.
You should probably just learn how to play, actually.
I heal both 10 and 25 man just fine. No heroics raid yet, but, so far, I'm pretty confortable with resto druids. It could get a buff on Efflorescence, wich I think is the most weak thing we got right now, but we are quite fine.
Healed Magmaw, Omnitron, Maloriak, Chimaeron, Atramedes, Halfus, Valiona/Theralion, Conclave of Winds and the BH guy. Just fine.