@William said:
I agree that is a good idea on the layering of solo vn with App vns. They are both molto espressivo sounding and reinforce each other beautifully. This would NOT happen if you layered Orch Violins, which would tend to "even out" the sound and make it less espress. However I do not route one track to multiple destinations, because it is very good to mess up the timing. That adds immensely to the realism and oddly the feeling of espressivo. Though I can understand how you would want to play them all from one track on a hurried job.
Layering of Orch can work wonders to stop notes sticking out. too much vibrato gets to sound nauseating when done to excess.
If something has to stay in the sample domain then I would play everything multiple times, and not even use copy/paste.
DG