In my opinion, that’s a very reasonable request. +1
While follow chord track works great when it comes to just that, a whole track that follows only the chord track that is, the moment I want to add a few extra notes (as leading notes, ornaments, solo lines not strictly on-scale), things get chaotic for me. I’ve thought of having a duplicate track NOT follow the chord track where I could write what extra I want, but if I could specify what part is “dumb-strictly-stick-to-the-chords” accompaniment and what is “a-little-bit-out” in just one track, it would be awesome.