Hi sometimes I need to use a mono main (if I am using only one speaker for example or in weird speaker placement situation)
Would be nice to have a mono settings for main and having a mono sum on the main LR
The main issue for me are not changing the settings for mono and just press a button to get mono out
In that case you can just plug into the left out of the main if only using one speaker, or alternatively, you could use aux 6 for the same purpose.
+1 for when you need the other aux outputs and are using stereo inputs from bluetooth / USB