Originally Posted by Turin Turambar
-The Witcher games have a strong focus on story, so even if this sequel is open world, don't expect something like Skyrim which has a plot but lots of people play it living random adventures as they explore. Even if they have done the exploration well in the game, a good part of what makes the game will be the story and writing in general.
In addition to this, CDPR have stated they wanted to try and curb "do every side quest before main quest" behaviour, despite their abundance, by having mixed levelling/difficulty. So folk shouldn't be afraid to dig into the main quest. A lot of stuff wont be possible until you're high levelled, and like GTA/other open world games there's post-campaign play to clear up other quests too.