Couple of things I noticed while testing Mistweaver that I would personally change. I noticed the CC is constantly healing, even while the group stands still and does nothing (no mobs, no aggro, no threat, just standing around talking). I was asked why I was healing when everyone was full health and no one was fighting anything. I just said I was bored and was practicing.
The second thing was the Jade statue used for healing is dropped while running to a fight, from another fight. This ties in with the constant healing, even while traveling and such. I think that it should heal while fighting, and topping people off while out of combat. Once everyone is full health, it should stop healing. Also, I think the jade statue should be dropped during a fight where it would be needed, such as heavy damage fights with lots of adds, or a boss, and not on every CD (this is just an opinion since I don't know much at all about mistweaver). I find that, for instance, running through Culling of Stratholme on regular or heroic with the CC healing nonstop it will drop the jade statue while running between waves due to the small skeletons that never stop spawning. So, that means that the jade statue could drop 50+ yds away and a big fight could be going on where it's needed but on CD.
Third thing has already been mentioned about the target facing. I left everything set up as you suggested, but I found that my toon was spinning around to face behind me, or off to the side, or wherever someone needed healing, which caused me to run in all sorts of odd directions. I run with my arrow keys and ASDW (and sometimes the mouse if I have to use the num keys for my hotbars) and with the auto facing, that causes some difficulties staying on course, lol.
Fourth thing, again was already mentioned, and that's with the interrupts. They're way fast. I noticed that the target was only getting about 1/10th of their spell cast before it was being interrupted. When I interrupt by hand the target is usually 50% finished casting, give or take 25% depending on how fast or slow I am.
I used mana save mode and never went below 11k mana (I'm wearing 3/4 Int-Spi gear, and 1/4 Agi gear still, and I'm level 80), so I never got to see the stance dance to build chi to heal, which is awesome to save up the mana like that and keep everyone up and running. I also never got to see the spin kick and rushing jade wind. The only attacks I ever saw it use were Blackout kick, jab, and auto attack. It may have used other attacks, but I couldn't pick them out that well due to so much going on.
All in all, I would give this 4/5 stars. It's really, really good at healing. It's also extremely good at tanking. I try not to DPS because the queues run 35+ minutes to get a dungeon, and I don't have the patience for the wait. Healing is even starting to take about 8+ minutes to queue up. Tanks, on the other hand, are still practically insta-queue**.
Keep up the good work, sir. This is really turning out well. It does a fantastic job as of right now.
** - I can understand why though because the DPS people just lack brains enough to know that they're not tanks, and don't need to run ahead of the tank pulling anything they can. I've forcefully wiped my group numerous times due to DPS trying to mass pull, or run ahead of me. When questioned, I simply say, "I thought I was DPSing because all our DPS was trying to tank. So, I thought we switched roles." That does one of two things: Gets me kicked or calms the DPS down and forces them to play their role.