@Burnyx : Are you really so naive as to believe they weren't aware of these issues when they released the game? I mean what do they have QA, alpha and beta phases for? Right, to root out bugs. Do you honestly believe that on none of their test systems these errors occured? Like "oh look, if quests turn grey I don't get XP anymore", or "hey, look, if I just start but don't finish the Ekimmara contract the game will crash every time I try to do the Destination: Skellige quest".
I'll tell you what probably happened: The publisher exerted pressure so CDRED would push out the game before it was done cause they didn't want to wait any longer after CDRED had already delayed the game by half a year to ensure it was "polished" (so unlike many others here I place the blame on the publisher ). Do you actually think the final product was finished (or "polished") by the time of the release?
If it had been polished there would not have been a need for a day-one patch. That is absolutely simple logic and therefore blatantly obvious to everyone (even the most die-hard CDRED fanatic). And why else would there have been so many bugs (some of which even game breaking) by the time of the release, not to mention the performance issues they had to fix in aforementioned day-one patch. I know I haven't touched the game in days waiting for V1.05 and with each passing day my motivation to even keep on playing diminishes (despite Witcher 3 being an awesome game despite the bugs).
I stand to be corrected but I am under the auspices that CD Project Red publish the games themselves.