What default toris are isn't super important as long as modmakers can change them in their own mods. I mean radical changes, like adding joints. Maybe even adding body parts. That would really open up the world of possibilities. We could make tori have 4 arms, like Goro, for a "boss fight" in a hotseat mod. We could turn uke into a giant spider, or a horse, or a dinosaur. More importantly, we'd be able to make models that offer very high degree of control and have super realistic ranges of motion, for those players who like that.