I find that it depends "who and what" you are playing for. I use minimum arranger backgrounds for an "educated sophisticated" clientele. When ya got the people that wanna let loose then more backing helps.

Arranger artists really are incredible musicians from dealing with all this diversity and constantly evaluating what they are doing and just analyzing all of the backgrounds from all the different versions and brands of these boards.

That alone is an education unique to this kind of artist.