I've been doing some more work on my opera recently. I actually finished it a few years ago, but now I'm taking some time to tweak it. The biggest problem is that I initially wrote everything directly to score and then reduced it into a piano part. Unfortunately, the multiple lines and cross-rhythms I used in the full score don't fit under two hands so well, so I've been writing a whole new reduction for four hands. It already sounds more like the orchestral score and if I ever get into a rehearsal setting, it should work much better.
I'm also revising some of the vocal lines in an effort to make the whole piece more singable.