If you're certain that you can greatly improve, then why not just let it be scored and find out how you do? I'm certainly not an admissions expert (although I did stay at a Holiday Inn last night 🙄), but from what I gather, as long as you improve by quite a few points a low score or a retake isn't a horrible thing. You might as well let the $210 pay for the best diagnostic one can get.
*shrug*