I just sent back my remote due to it being faulty (great customer service btw!), so I’m left with only the PCB buttons for the time being.
PCB button 1’s function (switching inputs) is a necessity. PCB buttons 2’s function however (switching scanline mode) isn’t.
What I really would like to see instead is be the ability to switch between (some of) the output modes associated with each input resolution (e.g. for 240p: lineX2, lineX3/16:9 and lineX3/4:3), as otherwise you might get stuck with an output resolution your TV/monitor simply isn’t compatible with.
Well, that would be my reccomendation for PCB Button 2’s default function; letting the user choose between several functions would be even better.