Thank you for your kind words! I'm glad you liked the piece and the performance!
Regarding the meter(s) of the piece, this piece (along with my Fantasy-Variations Op. 12) was one of my first to use frequently-changing time signatures, as up till then I had also been pretty strict about meteric "sameness".
No, I haven't made any attempts to orchestrate the Ballade yet. I might still try sometime, but it's not something I've been planning on doing just yet. However, I do think it would still work well as a short concerto...
Hope you're doing well! It's been quite a long while since I've commented here!