Thank you for all of the recommendations. I decided to scrap my old PS and go in a new direction. Hopefully one of these days I'll write something I feel worthy of submitting.
If you're actually worthy of law school, I doubt you'll ever get there. I never did. Just remember that many of the imperfections that seem so obvious to you are actually invisible to the reader since they stem from your process and the background thinking you've done to get to that point.
If you're any good there will always be a ton of things you'll know you could have done better, but that's how it is for everyone.