EDIT:
Scrapped it, starting over yet again!
I like that it’s quick and to the point. I’m working on mine as well and it’s fairly short. Is this the entire PS you’re using?
Aside from the extra paragraph specific to the school, most likely. It runs about a page and a quarter double-spaced. I’m sure I could fluff it up if necessary, but considering most places seem to say “2 pages max,” I don’t see much point in writing more than necessary.