Speaking as an owner of the Vienna Instruments Cube, I agree with Daryl that the Appassionata Strings 1 and 2 needs the additional articulations and, from my perspective, the "creation" of a Violins 2.
The next aspect is one of sales and price point. This L1 and L2 business makes Vienna into an expensive library. I would get rid of that, bundle AP 1 and 2, together, and come up with a price point that competes in the US market, even if it means setting up VSL USA and duplicating in the US and shipping accordingly to reduce fees.
The MIR technology is a fabulous thing and I'm looking forward to MIR Pro. But the whole concept is having what Silicon Valley used to refer to as a closed system.
A far more open system approach would be to insert aspects of MIR into the VI player as has been done similarly with the 1.9 release of LASS, and dragging on stage as with WIVI. This act alone would "clobber" the criticism that VSL is hard to mix with, which is why other libraries with pre-positioned seating/panning sell so well.
Power Pan moves stage left and right. Ernest Cholakis' TILT filters move stage front and back. Somewhere a marriage...