FYI, I'm a supporting GM for Hillan. So don't think I'm just here to fuck with you. :p

Weakness: It costs virtually no chakra to use, but as a result it's strength and damage are entirely dependent on the user's own Taijutsu mastery, so the strength of the technique can fluctuate between users and different degrees of stamina and fatigue.

This is a rather silly weakness since your character is a taijutsu expert. Naturally this means that for him this technique is strong. We're looking for stuff like:

A) how dodge-able is it?
B) can it be seen coming before the actual attack
C) etc.

For your last technique: it's a good weakness but I think it's still a bit weak. Maybe try to come up with something better. That aside looking like a good character.