the VoP monk/kensei is a very thematic build, but you encounter some problems.
sure, those using natural weapons are the only VoP characters that can truely use kensei, as it requires a mwk or natural weapon.
however, upon reading the rules for imbuing.... you can only pick ONE natural attack, and you must imbue ALL limbs of that type. the example used in the description is a Kensei who wants to imbue his fists.
this is truely irritating, because the monk unarmed strike description says you can use ANY limb....
meaning, that in order to play a VoP monk/kensei without paying 120% of the xp instead of 110%, you either have to use headbutting.... or the one other "unique" limb that you have... truly being able to strike with "ANY part of your body" and all that. and often, this tactic is combined with abberant reach, resulting in a character either running around using flurry of 10' reach headbutts, or something more disturbing.
normally, this sort of thing is just a gag for a monk character. but, since we have VoP anyways.... why wear pants?
town mayor: "Why is that holy man running around naked???"
party face: "he took his vow of poverty to the extreme, and refuses to own even clothes."
party arcanist: "now, hope you fail your knowledge(arcana) check, cause you don't wanna realize that hes unable to cast gutsnake...."