Dan:
Adaptive Chord Voicing (ACV), or Alteration Mode was a new parameter contemporary with G70 v3, the E-50, E-60, E-80, and newer Ateliers. I don't believe the G-1000 and VA-series can authentically process a style track containing these parameters.

Curiously, the alteration mode parameter seems to have disappeared on the GW-8 and Prelude. It's almost like a different team programmed these newer boards and didn't make any effort at continuity. I tried a GW-8 briefly (but I didn't try to import an E-50 style.) So I'm not sure whether the GW-8 would correctly process ACV.

Regarding retrigger, Roland does not have this parameter in their style creation, nor as an option during playback. It is somehow embedded in the voice samples. For example, you can take a factory style track that exhibits retrigger behavior (e.g., it sounds a tone when chords are changed between beats) and revoice it. The new voice may or may not retain the retrigger behavior.

Diki and I exchanged posts about this a long time ago on the roland-arranger.com forum. We never did come up with a definitive explanation, or a definitive list of tones which do or don't have the retrigger behavior. On the whole it's not well-documented.

Curiously, I immediately noticed that retrigger was enabled by default in GW-8, and it was added as a default on the Prelude with the OS version 2 update. I still think this is a weak point on Rolands. A user should be able to turn retrigger on or off by track. Either as part of style creation, or during playback (as with GEM's "Autobacking.")

Hope this helps,
Ted