I'm trying to figure out why my Mi Box doesn't have network access when I've left it off for several hours and as part of that I unplugged my USB Ethernet adapter.
That solved a lot of problems for me.
Vudu isn't suffering frame drops anymore and neither is YouTube. Live Channels isn't buffering my HDHomeRun and Tablo playback has been perfect.
I have an ASUS RP-AC52 access point literally about 6 feet away from the Mi Box and I still get speed tests at or just over 100Mbps without the wire. I doubt that I will try another Ethernet adapter if the WiFi continues to perform like it has today.
Weird that the Wifi works better than ethernet but seems like some sort of ethernet adapter compatibility as ethernet should ALWAYS be faster.