I’m sure you’re quite right. While I generally seek for change, I (perhaps perversely) do not manage it all that well!
Who knows, perhaps I will be glad for the freedom from interrupts, slows, and purges. I can see how a healer having strong tools in that area can be punishing, for if the healer is assigned that duty in, for example an interrupt rotation, having to choose between hitting that interrupt or getting of a vital heal is not much of a rewarding choice for the player. So I can understand the “if these are not vital abilities, why have them” reasoning (though they are great tools for dungeons where the collective range of abilities is smaller, the “Swiss knife” toolkit a Resto Shaman brings is hugely valuable.
I’m eagerly looking forward to the next round of updates on the spec.