This is cool, Swapdoodle was a good idea, the way it was presented, and the use of Mii characters, Friend codes, and blocklists werw easier to understand than other communication and friend features for 3DS, Wii U and even currently, Switch.
The fact that the way it's presented makes strangers uncomfortable sending messages to each other is a huge plus in success.
Miitomo is a step backward, and we should never have to see any videogames that promote 3rd network social app access ever again.