Right, final first impressions. Just finished the game. Not much to add to the previous. Unlike some here, I liked Chapter 3, and the nice, symmetrical way it tied up the themes that had come up until then. This is clearly Act 2 of a three-act play, even more so than The Witcher 1 was Act 1; so definitely an Empire Strikes Back-esque feel to the ending that really left me waiting for more.
So, verdict on how it compares to The Witcher EE? Just a notch below, I'd say. Many improvements in many areas, but I preferred the looser narrative structure and especially the interlude in Chapter IV of the original -- and, at Hard, EE was better balanced too IMO. I'm hoping this is gonna be a really rousing success and they'll be able to use this now very capable and highly polished engine to put everything into crafting more story, so we'll get that in the sequel.
Likes: Characters, story, writing, C&C, visuals, voice acting, combat mechanics, character development, stability, performance, overall level of polish.
Needs improvement: difficulty curve, economics, too much awesome button, balance. Also the narrative structure needs more air; Chapter 1 was very nice, Chapters 2 and 3 felt a bit too tight and railroaded. Could've used an "interlude" type thing between 2 and 3; as it was the ever-tightening pacing got a bit exhausting.