I know but she has the beta she should be able to run MK7 and give us a definitive answer by playing for a little while and reporting back here what the issues areIt could cause crashes in games which attempt to access Miis. So even if you never accessed them voluntarily some games might access them in the background (ie with Smash it uses your main Mii as your "avatar" thing). You could also run into the issue where other people use Miis and crash your device.
If she confirms that games that use mii's black screen or freeze then we know there is probably a serious issue with the mii maker entry point part of the exploit and can assume that GW had to go back to the drawing board and look for a whole new entry point unless they can fix the issue with a work arround
