in order to get note by note control, you need to start with single note samples (which is what midi is)

the reason the real tracks sound better than non-tweaked midi is because nuance is largely a function of phrasing more than it is a function of the note itself. so it ends up being a trade-off in which we decide between more control or more nuance

the best compromise available in RB is to generate multiple solos then cutting and pasting sections that are close to what you want. That way you get some control and some nuance

if you decide to go this route, be aware that you can control the passages a little bit by altering the chords before you generte a new cut and paste passage

https://www.dropbox.com/sh/ey71h8ep047758h/AAC12jNM0Hz9Q8zsh5iDeqNHa?dl=0