im just putting this out there but... i was thinking. with kido there is a lot of spells. thats not really true with zanjutsu of hakudo. sure they are a lot but who is really going to use Panchira Torunedo in serious combat, or at the very least call it by its name. Kido is, in my opinion, simpler to master in that theres hardly anything new or personalized about it. untill you hit a mater level and you can play with it. 

I think hakuda and Zanjutsu are different, esspecially zanjutsu. its not required that every shinigami use the same sword style so perhaps there can be styles to learn on top of what is talked about in the academy, which is probably kendo. the same is pretty true for hakuda, while its technically a mixed martial art in itself perhaps we can add martial arts styles to it. for example, Soifon is a more skill based hakuda master while captain kommamura was a brute strength hakuda master. 

so perhaps:

zanjutsu (kendo) skill 1-10 (4 points per level) 
style 2 . lvl 1-5
style 3. lvl 1-5
style 4. lvl 11-5

Hakuda skill lvl 1-10
style 2 lvl 1-5
style 3 lvl 1-5
style 4 lvl 1-5

brute strength lvl 1-20

something like that