Hi. I've read this thread:
https://forum.cockos.com/showthread.php?t=177484
At least some of the OP concerns are taken into account as the active "Record Arm(ed)" button looks slightly different when in "Record disable" mode.
Not in every theme, apparently, but still.
So, there are three main record modes:
1) record some input,
2) record output and
3) record disable.
Then maybe a dedicated look for the active "Record Arm(ed)" button when in "Record output" mode as well?