Your composition is well designed, to make best use of the sounds. (e.g. staccatos and pizzicatos, marcatos etc.). Well done!
Very nice effect. But in the beginning, when they try to sound as real strings...hummm...the weakness come out.
Sampled solo strings never work fine in cantabile or espressivo, and also vienna has a not totally believable legato (quite better the VSL chamber or sessions string legato).
The only flexible and effective solo string I ever had are "sample-morphing" Stradivari Violin and Gofriller Cello. They had still big space for improvement (of a slightly acid sound) but a unique realism in phrases and expression.
Such a pity the development has been abandoned by Garritan...I hope Giorgio T. (the owner of the technology) and Peter S. in the new company "Samplemodeling" will come back to it as soon as possible.