I'm glad the designers are spending so much time on healing. But, this article is bad. It's not surprising to see comments like, "...No reason why heal[e]rs should have it easy..." The article needs to own the design decisions. In Wrath they decided on a model that lead to very fast fights. If the raid's DPS was below average then healers were definitely going to run out of mana. If the raid didn't dance correctly then it didn't matter how much mana the healers had. The Wrath model was as valid as the next expansion's model, but instead of saying that, this article props up the next design by breaking down the old one.
Stay on message, the next expansion is going to be different and just as fun.