Pretty nice composition.
I agree that the samples sound dry, but aside from that, the fact that there aren't many articulations also give it an artificial feel. Maybe try fiddling more with velocity and modwheel.
When you obtain the EWQL, try experimenting with different articulations, ModXfd and round-robin patches.
If you ask me, I'd save some more money and go for a more advanced library than East West. I know it's bloody expensive, but try Vienna. I think it really is superior to EWQL.
LASS also has much better legato than East West. But be prepared to spend quite a lot of time setting the metadata right.