Allow the host to choose the tracks that can be selected, or even build playlists of tracks that can be voted on. For the next game, of course. Doubt that will ever be added to 8 Deluxe now.
I think I might be busy playing toy Kart to bother with the real one. Well, not so much racing, but Toad can have many wonderful adventures fighting giant Pokémon and running from dinosaurs and other things.