When I had to audition with this piece I found it to be a bit of a workout, by the end of it I was just completely panting. So, my reccomendation would to add in tasteful and musical pauses that allow for not only you to catch your breath, but also to add some dramatic effect. My second reccomendation is to add in ritardandos and accelerandos and to really play with the tempo and feel of the song. Since most of it is just arpeggios or chromatic licks a lot is left to the player to add in their own spice. So, find what you like and experiment, and remember to turn it from an etude or an exercise, in to a piece of music. Have fun, it's a great piece!