I just received my update to Komplete 3 from Komplete 2. There's no information regarding whether the included Kontakt 2 library has changed since last year's release of Kontakt 2 so I'm not sure whether I should bother installing it. Does anybody know if the factory sample set has changed at all in the past year?
There was a library update in one of the Kontakt 2 updates. I already had it but it showed up again on my update page at NI for Komplete 3. It was for some of the scripted programs (Akkord Guitar, the VSL Cello, etc.)
I got the official word from NI that there is no need to reinstall the Kontakt 2 library when upgrading to Komplete 3 as there have been no changes. There is a small update posted on their site that apparently fixes a couple of programming problems and missing notes.