Thank you - I will def PM you if I decide to re-apply in the next cycle! I called Prof. Lombardo and she told me she can't go into individual files and explain where we went wrong, but she said the Letter is the most important thing, and often people say the same things over and over so you need to really make your letter stand out. I really don't think there's anything else I could've done better. Will just have to wait and see what else happens!
Thank you all for your support and encouragement. It's really nice to feel the love during this stressful time (rejections amongst finals SUCKS).