It turned out to be harder than expected to automate a splitted pdf generation. So we gave up and I've released a combined PDF today (568 Pages, 8.8MB).
I find the filesize pretty big, compared to the 3.3MB of v2.0, but when I tried to re-generate the pdf, the chm to pdf tool crashed repeatedly, so unfortunately, this is the pdf doc for now.
I understand that to print this file, it's probably too big. Also due to the new javascript elements we used in the docs, the code snippets aren't that convenient as before.
To print it, I recommend to lookup the pages you want to print in the ToC at the beginning and then print sections using acrobat using page ranges.