I've been thinking about this for a while. And I actually think this is a brilliant move from Nintendo. Thinking back to when I play the PS4 – and there's a problem with the party, you have to inevitably leave the game, go to the party screen and sort out whatever needs sorting out. Sometimes I have to use WhatsApp to co-ordinate invites and parties. And in between games I'm actually browsing my phone ANYWAY, especially during loading times. Having a separate app on your phone (which almost everyone has anyway) – makes a lot of sense in a way. You don't have to interrupt the gaming screen at all and can liaise with your pals directly on the phone. It makes sense to me, but lets see how Nintendo implements it!