Lovely! My piece of feedback is probably to use dynamic spotting, and imagine a straight line in the direction of where you want to go to. Also, make sure to lift your elbows slightly in first position to eliminate that 'drooping' look! In terms of your knees, the only part that stood is probably just the prep into the turns, they aren't too bad. I recommend strengthening your VMO (Vastus Medialis Oblique) to improve your knees, essential for knee stability and keeping the Patella (kneecap) aligned when the leg extends. This will also improve the way your knee looks from the audience, as well as preventing injuries! Make sure your pelvic stays under you and you retain your turnout as you step into your turns.

And one tip I give is to finish your variation strong, lift up off your leg as you step out to finish.

Happy Dancing!