Originally posted by Diki:
And it IS interesting to see that the SA2 voices have been reworked to function without those stupid buttons. I always felt that having to run to these all the time interrupts normal playing technique, especially for an arranger player whose LH is already tied up inputting chords and making variation and fill functions. Perhaps these new triggering modes can be added to the T3 as an update?
Steve Demming... you reading this? 
I don't see any evidence that the SA2's are reworked. As George says above:
"However, just like the Tyros3, the voices react differently to your playing style and produce those amazing articulations when played with just the keys and not having to use the two buttons".
I can confirm you are able to cause articulations via how you play on Ty3 already - although not all (but then the missing good ones you should be able to play yourself

).
They might just leave the buttons off the PSR full stop.
On Ty3 the buttons are additionally assignable to pedals and it's not clear whether that facility is retained on the PSR. If it is all articulations will still be available via foot.
John