When watching TV, the single most useful button on any remote is the mute button.

The Android app has mostly handy functionally in the icon tray for quick access: play/pause, skip, back, adjust volume (which takes you to quick access to be able to do so, or to mute).  But it would be great to just mute right there in the icon tray 

Especially so because there is space available for it... presently there are options to do two things that seem random to me:  turn speech enhancement on/off and turn night sounds on/off.  

It seems to me you'd want the icon tray buttons to allow you to quickly do what you do most often, and I can't think of why either of those things meet that criteria, whereas mute absolutely does.

My vote is to replace one of those buttons with mute... Long live mute! Long live mute!