You're lucky you got it to work. Most of the time trying to use the "View as PDF" action just hangs, which is a known issue.
Regarding point 2... I imagine the font used for the document metadata is not going to be based on the fonts used in the document/discussion itself, which could vary depending on the fonts chosen by the original poster for that content.
Here's an older thread regarding View as PDF, showing that the function did not work at all in the past and had trouble ever since. I don't think there is anything you can do as a user to fix the remaining issues. Apparently some improvements have be been made, but since the next platform upgrade is planned to be installed by OTN soon, I would not expect any more improvements for the current version.