Re: Broly. You wouldn't want his complex shading baked into the character sheets, but his feature placement and the way he draws shapes is perfect.
I wouldn't actually want him to design this new anime though, because they're children. You want softer designs for that. Takahashi was mostly just to prove the point that Nakatsuru's old designs, which is what those were based on, don't hinder animation.
Speaking of Takahashi, since I'm having fun with it, Takahashi dumps from when he first started emulating old Nakatsuru!
https://m.primal.net/HNZZ.mp4