Blizzard announced a few days ago that they are reducing the mana return on Mana Tea from 4% to 2%. Mistweavers are currently the healing spec that is using the least amount of spirit – in fact most high end raiding Mistweaver Monks are choosing the Throne of Thunder drops that do not have spirit, or reforging out of every bit of spirit that they can – it isn’t unusual to see MW with the only spirit gems being Purified Imperial Amethyst, and only used when it is to meet a desired gem socket bonus, such as the tier chest. Seeing a Mistweaver with 5k spirit is pretty normal, and yes, that is even those clearing 13/13H.
Blizzard has finally commented on the change, and confirms it is to address the fact that Mistweavers are trying to drop as much spirit as they possibly can.
The fact that a 50% nerf to Mana Tea feels like a 50% nerf to your overall mana regen should indicate why the change was necessary. We want healers to want Spirit. When a healing class is actively avoiding Spirit whenever possible, there’s a problem.
That said, there’s still a lot of work and discussion going on here. We’re probably not going to keep this particular change. The overall goal is simply that you care about Spirit, and we’ll be rebalancing as necessary.
It might also mean that Mistweavers should be picking up some spirit pieces where they have opted for non-spirit pieces, such as rings and off-hands, otherwise some could be in for a world of hurt once 5.4 hits.