I get that it's hard to convert web elements (via Chrome) to a readable/nice PDF, but wkhtmltopdf really isn't the miracle tool it is made out to be. Like you, I have to tweak the options majorly, and even then it fails to support proper page breaks between text lines (i.e. a line of text that is cut across a page break looks so unprofessional).
We are in need of a true web to PDF conversion tool; it's one of those things that is overlooked in the business sector but represents quite a valuable niche.