Well, now that U7 is live there seems to me at least like the difference between light and dark path monks has become very big. Lets just look at what they get:
Dark:
ToD (10 AP, assuming you take ninja spy, and while it does quite a bit of damage, since its now neg energy, a lot of mobs are immune to the dmg (including ANYTHING with DW, which is sad, if it just were undead I would be fine).
3d6 Sneak attack (while this is really nice, its kinda the biggest benefit for dark monks right now it seems. 3d6 while nice, isnt a whole lot considering it only works when you dont have aggro, and are up against mobs with less than 100% fort.)
The level 6 Invis thingy (Arguably the biggest benefit of ninja spy, 25% incorporeality that stacks with everything IS really nice, however, it isn't enough to carry ninja spy alone)
A few mostly useless things (Water strider, some minor skill bonuses, shortsword abilities, faster sneaking, which all doesn't really add too much)
Light:
Smite tainted creature is bugged, so I won't be talking much about it, but if/when it gets fixed it will be even worse.
High bonuses to saves and AC - To be honest that helps shintao do what it was supposed to do. Support instead of pure dps
X, light, X finishers: Really nice and helps shintao do what it is supposed to do
However, the problem lies in how shintao probably can get HIGHER dps while still doing the support stuff. Here is the list of all the stuff of that kind they get:
Jade strike - Could possibly be as much more dps as dark monk gets from tod and SA against bosses like harry, if you consider having more than 1-2 players. Yes, its supposed to be nice, but while the dark monks struggle to get anything from their SA because of the aggro system, and thus only have ToD to rely upon, this is a quite large boost.
DR breaking - Now here is the thing. This adds more dmg than SA against anything with a decent amount of DR (again, lets say harry) because of that DR/15 is kinda huge, but you avoid the DR while still using your dps weps which probably have 10 or so more dmg per strike, which is about the amount that dark monks get from SA, except they dont because of things like fort and aggro.
And THEN we have all the things like kukan-do and so on. It just doesn't add up.
So I would really like to see a buff to NS soon, because right now shintao gets all their useful benefits AND can do comparable dps, which just isn't right.