Nice strong, fast, replicable swing.
But I'll bet the consistency on fast serves is lacking.
You don't adopt the archer's bow, to get your swing going upwards into the ball, instead of just towards the target. As a result, you spend less of your swing before hitting the ball, more of the swing after hitting.
Meaning, you have little high elbow, high hand after you've hit the ball.
If you could just arch upwards at the trophy, raising your toss shoulder, you'd have a consistent strong fast serve.