There are some other features and options with no title that I engaged and removed, unsure what they do. Also just a personal aside but I'm thoroughly annoyed that now, even if you aren't in 1st place, you can still be hit by blue shells and red shells and thunder bolts can and do smack you out of the sky now.
Lastly what the hell is up with the skintones for mii characters? It's been a while since I made one but I recall being able to look realistic brown and not just various shades of lobster red.
Also the character class is reversed for this, so heavier players are faster and I'm completely used to the opposite.