Never on 05 April 2015
I think they'l be relevant but by ignore many of your suggestions.
You can currently send a friend request if you know the persons user name. No need of friend codes.
Nintendo needs to give up on the idea of big third parties given them real support. Still go after indies but make sure there's a killer line up of exclusives at launch and for the first year. Then pick the right name and do the right marketing.
