Back to another listening.
What I like of this piece is that it goes out of the comfort zone of piano waltz.... The broken chords, the thickened chords,..., oh man, that makes it interesting. Sticking to the waltz pattern everyone-of-us-can-write would have been boring. If you want to expand it or not, it's another question. To do it would, almost as a need, to look for a different piano background, because being original the one you have, overusing it would make it ordinary.