I was interested up until you mentioned the dice. I'm not averse to having stats and systemic balance, but making initial stats due purely to chance is a bit much. If the starting characters are genin, limited to a few elementary techniques and having less skill and talent than others, why even bother?

I'd like to suggest having everyone start off at the same, roughly equal and pathetic level, and allowing them to grow and branch off as they please.

Otherwise, I hope others find interest in your idea.