In addition to the last PDF display issue I just posted about, I'm also still seeing this problem when printing imported PDFs. Everything in them seems to print rasterized, with very noticeable jagged "pixelation." Rather than printing directly from Publisher, if I instead export as a PDF, the PDF looks perfect when viewed in any program. However, when I try to print this PDF, it too will be rasterized, not nearly as badly, but it's still noticeable (after closer inspection it seems just as bad overall). It doesn't seem to matter if you set rasterization to "none" in the PDF export options. And one other note, everything created within Publisher prints fine, fonts, lines, etc., so this is only an issue with imported PDFs.
I first noticed these PDF problems toward the end of the pre-release beta, and hoped they would be fixed with all the recent PDF improvements, but they seem to still be present.