I have had a second listen to your track, Dave: there is nothing wrong with it.
Please note that this is only my opinion:
Clarinet and Piano are performed perfectly, only from time to time the Violin sounds a bit less credible, only here and there, it is definitely well performed overall.
1) I normally stay away from solo strings, they are the most difficult thing to render.
2) Particularly if your compositional skills exceed your production skills please be patient with solo string renditions.
3) Please listen to this: Guy Bacos - Solo Violin, with this sample library (which you already own) you can do anything that you might do with Joshua Bell, or with David Oistrakh. 😇
4) Reverb always contributes to realism, I would personally bring the clarinet and the violin a bit more towards the center and just a bit closer to the listener.......I would also try to experiment with different IRs comparing your track to other recordings of similar music. Again this is just a matter of personal preference but I would try a smaller and/or brighter stage.
Please don't be discouraged and keep up the good work! 😊
Francesco