Agreed. So many buttons with double functions, I previously had a Blackvue, 2 buttons, wifi on/off and mute audio touch button, once wifi is enabled you drive all its functions with the phone app, no need to attempt to crane the head in rediculous positions behind the rear view mirror to see the on-screen display and to try to remember which button you used 6months ago to do something when you last did it (or last read the manual).
Touch screen in a hot car has its own issues though, our other car has a nasty Novatek based thing with oled display & touch screen and the oled colour is all bad from overheating and burn in (admittedly the touch screen still works).
Edit:
Ok, I played a bit more with the BTR200, do you have to enable pairing function for every button? I have all 3 buttons reliably triggering their allocated function now, but I needed to long press each of the 3 buttons until it flashed blue, I thought the pairing function was only done using the main button! Let's see after a few unit power cycles and a couple of days between if this is now reliable. Talk about a counter-intuitive UI experience for this thing.