What I decided to try is to change the amount of voices in those ''too rich'' styles. For example: there is a preset Fantasy on Lower1, this preset is made of two sounds, I mute the second (with new feature to edit presets), if I play now 4 note chord I believe to free 4 voices. On the other hand I have to be satisfied with modified Fantasy preset.
Maybe this is one way.
Ideas appreciated!
Luka