Thanks everyone for your kind comments.
To Pianistimo:
Yes, there are some unevennesses that I don't like (the one that particularly annoyed me was in the trill section, and that was due to me not having the fingering 100% clear in my mind beforehand).
I don't sing, but I have a considerable fondness for operatic transcriptions/paraphrases, and I hope it shows. I think it's often helpful to inwardly sing the melodic line when practicing such material, in order to mentally reinforce it, and to assist voicing.
When you're talking about the "sparkliness", I'm not sure if you're referring to the piano in general, or specific passages. I made a conscious choice in some of the passages (e.g. the passagework one starting at 2.20, and the arpeggiated one at 3.30) to use the soft pedal to alter the sound of the treble (whilst taking care, as one obviously should) to ensure that I brought out the melody and kept the accompaniment and passagework in the background.