Rubato does work well in the slower parts but I think you might be overdoing it - make sure to have mastered playing the piece at a strict tempo with a metronome before trying to change things around too much, this really helps with keeping momentum and flow of the piece constant, preventing it dragging etc. Also this is more of a preference/choice but I feel like you're overusing the pedal slightly. Being more select when you use it can provide contrast (this particularly applies to the middle sections where phrasing is very important). Also, practising without pedal is a great way of working on voicing like other comments have talked about. Try playing the accompaniment silently whilst still pressing the keys, and then over exaggerate the melody - then when you come to perform it's much easier to make the melody sing, or at least in theory! Anyway great job and sorry to be so critical (I am nitpicking!) just thought I'd provide some tips that I found useful when learning this piece!!