The improvement is astounding in just three years! The forehand looks remarkably painful. I feel so bad for your wrist, but if it works, then so be it. I also noticed you do the ballerina kick with your back leg on your backhands sometimes. Your volleys look a bit awkward at times, that's the best i can explain it. You also foot fault a lot, but thats the least of your concerns.
Nice footwork, great smile.