It depends alot on the genre of song and the style involved. Very often, less is more. I've sure noticed a great improvement in the sounds of the different instruments/voices. Now a country song can actually sound "country" and across the board, the styles in most genres are much improved. Still no dobro or flattop guitar, though. Drat!
I generally tweak nearly everything to tailor the style to the song I've written when possible. Volumes, changing a sax to a bass or guitar, etc. I'm still not too happy with the Vocal Harmony settings. Much too complex and complicated. Mason is right, do VH as little as possible.
Dave Rice