Yeah, as a keyboard player, you pretty much have to do some orchestration. I'm not sure how your stereo field is set up but it feels like those strings are covering the piano a bit? I would probably bring the piano down the pipe and pan everything else to some degree it is a much more complicated style of music to mix well. Because there is so much going on. I love Ivory, good job on that buy :-)
Orchestra:
1. Lay it out with panning, pay attention to which instruments own what part of the spectrum and where they sit in the field.
2. Use the verb to position some farther back behind others w/less verb up front.
3. Be sure to have areas of quiet passages and others that are quite loud with crescendos.
4. Then there's the whole bit about which instruments play when, who has the melody, who has the counterpoint. It is so much more complex and dynamic than pop, rock, country, blues and most of what we do here.