There's actually a reasonable number of techniques that have been released since the core boook. I think there are some that might fit some of the original schools better as being in their curriculum.
For example, I think that the Hida could easily have Bonebreaker Style available at Rank 4 instead of something else. And the new Rank 1 polearm tech (I forget what it's called: Branch Snap Strike?) could go quite happily into a couple of the spear-wielding schools. Are there any others that people think would do well together?