Mike,
here is where you are incorrect:



I own a G1000 and know what the manual is talking about, as this is the standard Roland practice.

Roland does recognize all (or most) chords, and plays them correctly. What you are misinterpreting in the manual is the fact that for the three chord types (major, minor, seventh) you can actually record completely different versions with totally different style tracks - in effect for every style, Roland records three times the number of tracks. Then, depending on the chord you play, one of the three appropriate style versions is conjugated into your chord. Since you may well be using the chords from all three families in a song, you should try and keep the three versions similar. Nonetheless, the ability is there. I am sure that VA76 manual describes this feature as well. In fact, I think that Roland does a pretty darn good job of playing styles - sorry if that is not your experience.

If you search for this, you will find that Yamaha uses a much simpler scheme: for each style you record only one version, in a Cmajor 7th chord. Then the instrument uses some logic to determine the actual chord played, and conjugates the style to drop the 7th note if the chord played is not a 7th, and substitute a minor 3rd for major 3rd if you are playing a minor chord. Even this simplified scheme works pretty well, although, admittedly, there is not much varition between the way the major and minor are played.

While I understand your concern that the user has little control over the actual style parts played, the alternative would be to get an instrument with an arpeggiator, and program different style tracks for each of the dozens (60+?) key combinations corresponding to various chords. This would be prohibitively time-consuming to me, but if you have time on your hands and think that the result will be better than playing a style, that is the alternative.

Regards