After playing around with the new Shintao enhancement tree there seems to quite a bit of room for improvement.
1. The tree seems to be geared specifically to monks using Earth stance with no benefits to any of the other stances. For instance at Tier 2 there is "Iron Skin" - only available to Earth stance while at Tier 5 "Violence begets violence" also only available to Earth stance users. Even "Meditation of War" seems to be pushing players towards Earth stance to get the insight bonus to HP and PRR.
2. "Meditation of War" - Using this enhancement in Fire Stance is fairly useless because as it provides and insight bonus to tactics this will not stack with items that provide Combat Mastery and so what was meant to help reduce the drawback of the lost wisdom in Fire Stance really provides no benefit at all. This is unlike most other tactical enhancements whether they are racial or from for example the Kensai tree which provide stacking bonuses.
3. Let's not forget "To seek perfection" - a fairly useless capstone when compared the other monk trees or almost every other prestige enhancement tree. +2 Wis and +1 to benefits of tainted and no negs from taking Meditation of War (which is an optional enhancement)? That definitely needs to be beefed up a bit probably with some ki generation Henshin has passive, Ninja has it on sneak but nothing for Shintao? another possibility would be to do something similar to Ninja Spy by giving an enhanced crit range against tainted foes or something.
Just a couple of cents, since I don't like it when I get too pigeonholed into a particular stance because the devs seemed to have forgotten that the other stances exist when it came to building this tree.