Noel,
There a couple of other things, but one came to mind (late) that I want to mention.
Most likely a user will be making his/her own "band" when using Utility tracks. For example, I almost never use pre-made styles. I use them mainly for audition / inspiration. So a proper sorting tool is a must for somebody who is not using original Rt/Rd/Midi set.

To me personally, extra generating tracks are #1 wish/request. I just want to see it done more or less properly from the start. It is not a "feature" it will be more like a core workflow item and I see myself using it at least 8 out of 10 times.