I'm not encouraging healers to butcher their regen. I'm merely pointing out that only allowing them to use spirit gear is not the way to go as you'll have too much regen and not enough throughput.
And to counter your reforge argument: It's not as if locks and mages can't just reforge any unneeded hit.
that's true about the reforging, but if a healer takes a spirit item and reforges what they don't need, they're still getting regen from the item which imo is better than no regen on an item