I totally agree. But remember that we have to keep things mana-efficient. Of course, a GHW with procs (Unleashed Elements + Focused Insight) heals a ton of HP. Nevertheless, this heal should only be used in burst situations.
I do not know 10-man raids yet; I expect a lot of burst-damage. But there will also be"predictable" damage situations in which you heal most efficient with HW. And in those situations you should have at least some haste.
At the moment I'm very happy with the following priorities: Int>Spi>Crit>Haste>Mastery. Reforging Mastery to Crit is the best solution in my opinion. Haste is important but can be pushed by other things (weapon/trinket procs, WL haste buff, etc.). Mastery imo is mostly negligible because it helps the least at the moment.