I see you're writing the orchestra part as a condensed piano part. Usually this is done after the orchestra part, as a method of making performance easier and cheaper. While it's an interesting idea to write the part as a piano part first, will everything really translate well in orchestra? It's hard to tell exactly what you have in mind when it's just a piano part. Try orchestrating it next!
Your virtuosic writing is very impressive! It's all very pianistic. I would like to see more moments of contrast though. Almost everything you've sent so far sounds like one big coda with the orchestra going off and the piano flying away. It's impossible to effectively keep energy like this. There has to be contrast, low moments, for the high moments to really shine. The one quieter orchestra section isn't enough. Let's hear some secondary themes, some alternate textures, some interaction between piano and orchestra. Even the most virtuosic pieces have moments of slow beauty, Gaspard de la Nuit, Islamey, etc.