Nintendo has always been very reluctant to include social features within games beyond a very difficult to use friend list, hell, they removed SwapNote from the 3DS because it young players were getting inappropriate notes sent to them. Frankly, I'm surprised they haven't binned Miiverse some days, but they do an excellent job at moderating it.

I wouldn't expect Ingress-style open comms, but it would be nice to at least be able to message other players on a friend list.