I can't tell you much about masakatsu bo-jutsu, other than it helped me a lot to understand empty handed aikido too.
as you have mentioned it is a good method to find an understanding of angles and correct body postures. though in the beginning it felt very strange 'cause there isn't a direct link to empty handed techniques.
to learn it from the tapes though is a bit dangerous, as without a teachers instruction it will probably lead you in a wrong direction...
but if you got the chance to learn it from your sensei, well then go for it..