I had a couple disconnects day 1, kept running in the same direction, camera kept spinning, sword kept charging up to max instead of hitting. I was sitting between 3 and 4 meters away from the console. To fix it I swapped the hdmi cable for a longer one and put the switch along the wall in the middle of the room. Now it's 2 meters away from me with no more issues.
Wifi to my router barely works in my game room. The ps4 still gets about 20 mbps over wifi down there. The switch struggles to stay connected at all. At least it's easy to take it closer to the router to upload and download something. I guess online multiplayer won't be happening in my game room on Switch.