I am not really qualified to talk on behalf of the pros here, who make a living out of their instruments,

but,

what I have found out listening to all of you is that it is not the sounds themselves, it is the player who plays (controls) the sounds.

I think that what you should demand is a new instrument with the same quality sounds as found in PSR 910 and above, which is satisfactory enough for most of you sonically, but with enough logic behind the style department to assist and compliment the player of the lead sounds.

Sure, a real sounding guitar backing is nice to have, but a way to add even more control of the style backing would be the way to go.

Some people here have said that it would be nice for the arranger to know in advance what the next chord would be, so the bass would "walk" its way there, much like a real bass player would do. Of course if you had the capability to "announce" to the system what the next chord would be, the bass would not be the only instrument affected, guitar parts might also follow, for a more realistic "real band" effect.

My theory is that this "bass player plays a path to the next chord" thing does not happen all the time. Many songs have such chord changes in the beginning of each bar.

So a way to do that would be to have a second set of keys, say only 1 1/2 octave long, on the left hand, above the main chord recognition region on the left of the main manual.

This second set of keys would exist for the occasions where you would like to "announce" the next chord, early in the previous bar, so the "rest of the band" would use the remaining bar time to perform the necessary steps towards the next chord change which would be the one you previously announced.

Of course this "second set of keys" could also be a second 25 key small midi keyboard, attachet to the G 80 or the Tyros 4 via midi.

Couldn't that work?