Not really what I want.
I want e.g. keep the solo as it is but just change a specific setting and see how it affects the solo (the whole of it and not just a part of it) WITHOUT a completely new solo being generated.

I know I can have a new solo with the changed Soloist settings generated and I know I can freeze the last solo and/or copy it over to Realband or DAW to then edit or replace parts of it and/or process it with FX etc. but what I want is neither of them.

I would like to have a new solo generated which differs from the last generated solo ONLY in aspects related rto the Soloist settings changed since the generation of the last solo.

For this BiaB would have to take a note of all the decisions it made to generate the last solo and then modify only those decisions which rare affected by the changes made to the Soloist settings.
And also wherever randomization was involved in generation of the solo, in the following iteration, the existing solo should be taken as basis instead of the randomization.

I took Soloist as an example but what I say applies equally to Melodist, Harmonist, Guitarists etc. too.

I don’t if I could make myself understood…