allow the user to choose the input and output routing options for a track as part of the disclose triangle options

this would have been helpful here

Not sure if this is what you mean ?

nice graphic how did you do that
yes that would work

That's just from REAPER.
It use to be the same before I got them to put a Solo button on each track, whatever track was clicked on it would Solo, same with recording you still have to click on the track you want to record on first, very annoying, so yes it needs and Arm to Record button and input select on each track. It also needs the Live waveform draw so you can see the level and if it has gone "Hot" in any places as you can't keep your eyes on the VU meter every second and wait till you have recorded the whole track then see it's gone hot.