Since I made an icon for Kaguya's when there bones are out I think Stego should make it so when their bones are out and people attack them with taijutsu they lose a certain amount of HP
should cut the attack in half or even into a fourth cause in the show when kimimaro was fighting lee, lee opened initial gate and the bones just grabbed his foot when he was going to do the lotus
also the kaguya shouldn't be able to move since you would think it would be hard to move when your bones are sticking out your body and should take a certain amount of chakra like the other hyuuga move that ain't kaiten it blocks attacks but doesn't reflect them back.. (this move is also know as karamatsu no mai so the attack should also take damage that represents the kaguya's tai)
it was an earth seal not cs and he used the bone defence when he was normal he did that before lee even got drunk.. he did tessenka no mai in ES2 and thats it he even did sawa while normal so i'm assumin that he can do all moves while normal just makes em hit harder when he is in ES2.. (make earth seals :D)