Let's keep going...!

I would like to see MORE fills between sections. Theoretically, a four Division arranger needs 16 fills to have a unique fill from each possible Division to every other Division (including Fill-to-Same). Perhaps the full 16 is a bit much (although honestly, it is easier for a style composer to make a unique one for each transition than to have to finagle ONE fill to work well for a variety of different transitions) but more than six would be a huge improvement.

I would also like to see a separate Break/Fill for each Division. The break/fill for the Var1 division needs to be VERY different for the Break/Fill for the Var4 division. I think Ketron already has this... an excellent feature. A compromise could be achieved by having only two, and having them for Var1-2 and Var 3-4, to aid style composers that don't want to be bothered with the full 4 (as an option).

At some point, would it be possible to look at played note DENSITY and velocity? If you are getting pretty busy with your RH, maybe an alternate drum and bass Part could be switched in, to make the rhythm section appear to be actually LISTENING to you (perish the thought!). Busier guitar Parts, busier drum parts, busier bass Parts (restricting the feature to that might take some of the burden off the style composer) as an alternate to simpler ones (possibly much simpler than most Yamaha styles currently start out at) switched in and out of by how rapidly you are playing yourself might be the next step in creating the illusion that the backing band is REAL...

Do you already have the feature from Roland where a velocity offset is applied, either negatively or positively (depending on how hard you are playing) to the Style Parts? When drum and bass Parts use velocity X-switched samples, the effect of the rhythm section following YOUR dynamics is uncanny. You could also improve on the Roland implementation by allowing a user defined window for dynamic detection, allowing you to set how LONG you need to be playing at a higher or lower dynamic before the velocity offsets start to be applied.

I would also like to see styles with longer Divisions, up to 16 bars, but with a user defined parameter allowing a random start point at the bar 1/4/8 point, to make accompaniment less predictable.

Notice a trend here...? These are all ways to make the arranger more MUSICAL, and more responsive to how YOU are playing, and less predictable and repetitious, imitating what REAL players really DO...!