For the avarage user the way of mario mart and splatoon is way better than smash (wii u). Its a trick, but they make them work seemingly more smoothly.
Sending messages to other players is what I would like to see in Switch games like Splatoon 2. Matchmaking in Splatoon 2 seems fine to me, apart from turf war and lowest ranks. The battles are surprisingly even most of the time for me and it feels like both winning and losing are possible, unless its 3vs4.
Hopefully they will make Smash5 online better and add more ranked modes.