Shin'en says Fast RMX patch should be coming soon

@Xolono69 As soon we get the release date by Nintendo we will post it here. It will be soon.

— Shin'en Multimedia (@ShinenGames) March 21, 2017

Seems like Shin'en has already submitted the patch to Nintendo and is just waiting for a final date from them. I wouldn't be surprised if it hit tomorrow.

from GoNintendo