Welcome. I believe I follow what you are saying, but you might be more clear by providing some examples of which you speak. Post some graphic files somewhere on the Internet (for example, Dropbox) and include links to them in your posts here. It is not only 'allowed' but illustrative.

When I do a song in BIAB such as So What, I write the melody as MIDI in the Melody or Harmony track, assign a patch to a nice acoustic bass, and mute the RealTrack playing bass during the playing of this melody.

BIAB is not without any support for quartal harmony, as it supports Sus4, m11, 69 and 13th chords, all essential in quartal harmony. And slash roots can get you even further.

But go ahead and post some ideas. That's what this forum is for.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.