Unfortunately, a bug crept into this update which causes the Miitomo app to crash when inviting a friend through email. Nintendo is aware and even posted in the News section of the app that a fix is in the works and will be released shortly. Hey, these things happen. In addition to the new invite features, this update also allows you to friend/block someone from the comments or heart lists, and it allows you to edit an existing Miifoto right from the comment list before posting it (yay!).
There's also some bug fixes and optimizations, though I still feel like Miitomo should be a lot snappier to load up and navigate around. Regardless, it's a fun distraction that I'm not quite as into as I was that first week or so but I still pop into every now and then. Hopefully Nintendo keeps adding cool things to it as well as some cross-game integration when they finally start releasing actual games on mobile. Bring on , I say!