Hi Mark, nice seeing post again. I try not to get into what might happen to the arranger keyboard, and focus on how I can make my keyboard fit my needs.
My opinion:
Styles can become boring, so this is what I am doing to make them interesting.

1-I picture a live band playing, instruments do not play all the time. When someone is singing the instrumentation might be piano, bass, and drums. At another point the brass is featured.

2-I am using a Pa 1000. The keyboard has three dedicated buttons which I have set up #1 to mute the 5 Accompaniments, leaving only drum and bass. #2, mutes the bass and #3m mutes the drums.

3-Pads are next. I spend a lot of time selecting which pad will add to the style. A cymbal might be playing on all four for Jazz. Strings, and brass quietly in the background. A simple finger snapping on the second and fourth beats.

Imagination, imagination, imagination. I listen to the style with the 5 Acc. muted, then add all the pads and I have a variation of the style. Instruments, and volume can be adjusted in the style. The left-hand instrument is important, it should complement the right hand. The volume of the left hand is set somewhere between 70 to 95, I want to hear the left hand slightly below the rest of the instrument.

The last step is to setup the four OS settings, they need to compliment the style and song. This takes a bit of time, but the end product is that the style is me, and the style is not as boring.

My middle name is teaching, I love to help, John C.

PS, Bill there is so much truth and understanding in your posts, NICE.