I understand what you are saying, even if for now it's not the direction I am following.

Yes we can have problems with CVs.

For examples Ketron or Roland styles can have 3 different CV * 8 tracks = 24 phrases for each section
But limited as Maj / Min / 7th

Korg has even more CVS.

Yamaha has only 16 phrases BUT can has more chords. Record one bass line for Maj, one for m9, one for #11Aug.......

So finally, you have to do some compromise when you downmix to a converted style.

Yamaha and Korg has some complex guitar tracks who need a special engine. You can convert them to a simple Cmaj chord.. but you will miss the guitar player style...

And more examples like this...