Paul, you might try changing your chord mode to 'Fingered 2', or if you use easy chords, then 'Easy 1.' These latter modes require releasing all the keys and re-pressing before a different chord is acknowledged. It's not as quick, but in your case you might find it more positive. HTH!

One trick that I've used with the style voices, is to lengthen the attack or add a slight initial delay. This gives you a few milliseconds to get all the notes down before they start sounding. I also sometimes reduce cutoff (brightness) and resonance, to make the sound "darker." As some of you have already stated, the play is less punchy and expressive. For accompaniment I find this ok, it really depends on what you're trying to do.