I have played or run a dozen games using the PDF and while an official errata would be nice, I don't need it to run a game, I think the SR5 Rulebook is perfectly playable as is. The issues I've seen kicked around the forums are minor. The core rules are solid, and the Matrix rules are the best yet.
I've seen a few hardbacks and there is no doubt is a beautiful book. I use the PDF on my iPad, so I never planned to buy a hardback, but every time I handle one, I waver.
As for a second printing, they probably have to sell most of the first one to make enough money for a second. Game companies run on razor thin margins.
Is it just me or have we peaked on the SR5 errata? The Rulebook has been pretty thoroughly vetted by the community by now. A number of the recent rules discussions are starting to recycle old themes. That is a good sign.