IOW, I'd like to know what the dev-only parameters are, or put another way, what the practical limits are within any given instrument, from a parameter POV, the stuff you can and can't access as a mere user, even Pro, or something like that…I'd like more details!
Which has basically been my starting question with every PM device I've ever been able to get my hands on…which is pretty much everything I could afford for the last 30 years or so:)
Pianoteq Pro is about the deepest one I've yet had the pleasure to access, even though it's also one of the most limited, in the sense of targeting very specific real instruments to model, rather than promising limitless scope for instrument design.