>There is a much better PDF

LaTeX is not an aesthetic cure-all. The original, at least, has been subjected to the critical eye of a typesetter. There is no disputing taste, but I will anyway. If you're using an e-paper device, btw, you can vectorize the text in scanned pdfs like this by applying "Clearscan" in Acrobat, or the equivalent (after which, it becomes readable).