Godfrey,

This was the problem on VA- series as well, IMHO, as well as with many other keyboards, like Tyros, etc. However, on the VA this was made worse by the response of the touch screen. The ergonomics is not helped by the fact that you need to reach to the right of the keyboard to press the bank select button, than move hand and refocus to the screen to start paging/selecting individual tones. (My old Roland E70 is great - there are bank select buttons, and 8 tone select buttons immediately below, making it quite easy, but its number of tones is much smaller).

I guess, Roland (G70) and others do not really expect you to use tone selection process during the performance, but to use presets instead, which are callable with one (one-touch) or two (performance memories/registrations in Yamaha speak) button presses. Unfortunately, the same tedious process must be followed with styles, and for a live performer quick style selection is crucial.

There is not much you can do, but as I see it, there are two possible approaches, which at this time may be achieved with a software update (they are not likely to add more physical buttons):
One - provide high display density screen mode, where instead of shwing eight large "virtual buttons", They give user an option to disply, say, 16 smaller buttons - this should help reduce paging.
Two - provide a selection of "Favorite" tones from each bank, which appear on the first page, the first time you press the bank select button. Pressing the bank select button again (or page forward) would
show the regular list of tones. This way, you could always quickly get to the tones in the group (perhaps not the best ones but still very suitable for the piece you want to play).
I think that the combination of the two options is what you should push for.
In either case, you should contact both your dealer Roland and customer service, and start complaining, yelling, screaming, and otherwise raising hell, until they understand that this is a serious shortcoming which can be quickly fixed nonetheless.
To me this is a serious problem with regard to user-friendliness, which kept me away from VA76. I hope Roland takes this seriously, and provides a fix for it in the OS- update.
I hope that all the potential G70 customers join me in voicing their concern.
This is one situation where touch screen provides an advantage over having buttons around the screen for selecting things - you can increase the number of "virtual buttons" with a software upgrade. I hope Roland capitalizes on this advantage, and along the way sheds its image as the company not responsive to customer needs.

Regards,
Alex