This feature request has been around since the PitchFactor. I wouldn’t hold out much hope for an update now [Max is maxed out]. I too had some hope for custom scales with the release of H9 Control, but I understand why it wasn’t incorporated. Backward compatibility, hardware limitations, probably a lot more involved than pointing to fixed sets of LUTs, etc.
Best you can do is dig deep into mixing & matching the Rhythms with Dynamics, pitch sequences & FX, in order to carve out some ‘new’ patterns. If you’re running mono, a set of two Rhythms blend into a third type. With stereo, panning combinations. I can give you a few ideas to try out at this link: