Did you listen to the demos, Bill? I'm afraid I'm not that impressed. Both the violin and cello seemed to respond to velocity VERY poorly, jumping in and out.
I tell you, if there's one area that SA2 could be REALLY leveraged, it's a REALLY good solo violin and cello. For starters, legato/staccato playing is indistinguishable on those new sounds. And then, to replicate string sounds, the velocity of the keyboard is a poor place to try and control dynamics, being better done with a foot controller or mod wheel, swells and diminuendos being integral to the string sound...
Honestly, what did YOU think of them?
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An arranger is just a tool. What matters is what you build with it..!