I dad the opposite experience initially. I just found EVERYTHING sounded amazing ? my initial time with the KPA was spent like - pick a profile (any profile) and play with it all night. Next day pick a different profile and enjoy it for hours repeat for months ?
One suggestion for learning the controls though - some of the settings such at tube shape or sag can be quite subtle. We all have a tendency to listen with out eyes too so we can convince ourselves we are hearing a change based on the number on the display ( likely to be an even bigger problem with a vision on screen editor ?) rather than using our ears. My solution to this is to use Morph and an expression pedal. Choose a parameter you want to experiment with and assign the heel position base state one extreme and the toe down state to the other extreme. Now just close your eyes and play. Move the pedal WHILE playing and really listen for any changes.
Once really comfortable with that one parameter reset morph and linke to something else. You can even experiment with two or more changes simultaneously. E.g. what happens when reducing sag and increasing shape instead etc.