You are one of the few pianists who plays the Fantasía Impromptu with the appropriate speed in each part. The others play this piece without feeling the story it tells. Your execution is perfect. Congratulations, you play better every day. On the piano you don't always have to play quickly, you have to execute the pieces as the author composed them. Each voice is heard well differentiated and at the same time in a harmonious whole. Chopin would be happy listening to you.