I like to use instrument tracks, because they make the track view better arranged. But I am missing 2 important settings on them (not visible):
The audio track input
The interleave button
Today I use the work-around that I split the instrument track, set the 2 things above to my liking and then remake the instrument track. That works so far, but I have no visual control about those 2 settings anymore and so it happens that I forget to set them. So it would be a great improvment if the 2 items would be visible on instrument tracks!