Pipeline,
Thank you for taking time and posting videos. I have tried Rapid Composer some months ago. It is interesting program indeed. It has some very nice theory based power features, but for some reason it felt a bit "transitional" to me. Not in the sense that it lacked features, quite opposite I would prefer it to be simpler, just sort of basic "chord scratchpad" with some assistance.

Scales, inversions, slash chords, circle of fifth, suggestions and basic timeline, just so you can enter 3+ chords and just hear it on the fly and possibility of entering chords from controller directly.
I would stop it here. I know Rapid composer is able to do those things, but it is a bit obscure and not in one place. And you are right about BIAB translating chords wrong from other virtual controllers...

There is also a "thing" called Captain Chords 2.0, but you have to be connected to "their" database and I do not feel happy about it, but the prog. does look very interesting.

I guess I am looking for a software that will hit the sweetspot for my uses. I do not hibernate waiting for it, life goes on smile One such "sweetspot" program for me is vArranger. Together with BIAB they kick @ss, but on the dark side, they both badly need some modernization/development enema.