No, you still don't quite get it, abacus..... this isn't at all like having tongued and legato sounds layered, with a velocity cross switch or controller to cross them over.

That is what makes the T2 so unique.... it can do all that in realtime by using your phrasing, NOT how hard you play. Horn players can tongue hard at very quiet volumes and play smoothly VERY LOUD...... it's what makes velocity-switched saxes so fake. You can do some very convincing things with breath controllers, and foot controllers, and aftertouch, but they are all counter-intuitive to play..... Using your own natural phrasing to make the samples change for you is exactly what the Hammond percussion does, and what makes the potential of Yamaha's SA technology so breakthrough. It is VERY playable. No need to learn new techniques or body coordination tricks. Just play and phrase naturally (like a horn player), and the samples play and phrase for you. Brilliant.....!
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An arranger is just a tool. What matters is what you build with it..!