Sharing miis
Sure, sharing Miis for optimization is good idea. There's a way in the game to make a QR code of a Mii so maybe in the future someone can make a Discord server or a forum post where you can share QR codes. You could also post the Mii to Mii Central under a certain name so other people can find it. Thanks for the suggestion!
Recent runs
Level: World 8 - The Sky Scraper