I think that Witcher 2 is one of the best WRPGs of all time. In regards to Open World, it is not as good as SKYRIM (cuz we get huge maps but still not a huge world like Skyrim, and no ability to move where we will since there are paths laid out). But in terms of story, RPG elements, graphics, gameplay, it beats other WRPG hands down.
I dunno what you didn't find enjoyable. It was excellent from all perspectives IMO. Maybe it ain't good while playing with a controller...
I've played this game 3 times, and each time I wondered whether I have played that area before or not. You have the chance to play half the game completely differently (when you get the prompt to side with one of 2 sides). This makes it awesome. There is so much content in Witcher 2 in terms of main story line, and I haven't played the enhanced edition, but what was lacking in the original game (sidequests) is added in the EE. So that might have made it all the more awesome.
For me Witcher 2 was one of the best WRPGs of this generation. The game was polished, had no bugs or glitches like there are in Skyrim, and for this, I love it a lot.
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And for this reason, I believe CD Projekt can do something awesome in this game. Plus they are one of the best devs ever. They made a port of an excellent game for X360, gave PC gamers the content for free (which is an unbelievable deed when you consider all the major game companies nowadays). So they are good devs and good people. And they can make an excellent game.