Mike,
Your point is taken.
Not having had a Korg, I did not realize that it had the facility for the 3 custom style variations.
As far as a G-70 goes, I am hoping that since G1000 is not causing me any problems, neither will the G-70, though I concur that if you need more style variations, you will be hamstrung not having them.
I am still curious, though, how it will work with the FC7 switch - the schematic for it is trivial (the center jack contact is the common, and each switch makes the contact between one of the seven other pins and the common). I think anyone hampered by the lack of buttons on the VA or G-70 should use/build one. Anyways, the question is what happens when you press a fill button on the FC7, does it advance the variation of the style as well as trigger fill (unwanted operation) or repeats the previous fill and keep the variation where it is (better design).
Perhaps one of the new G-90 owners can enlighten us as to how it works.
Regards,
Alex
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Regards, 
Alex