[color:"orange"]i really loved 2D models[/color]
Good 2D models certainly beat bad 3D models. I think that technology is getting close to allowing good 3D models to beat good 2D models.
[color:"orange"]3D is just making the production cost higher (is this really true?... i don't know)![/color]
I don't know either. There is certainly a more elaborate graphics engine required, but then each model should be easier to make than a complete set of sprite animations, and any changes to models in 3D are much easier to make than 2D.
[color:"orange"]i hope your right saying it wouldn't have any incidence upon the story line[/color]
Well, I don't believe Larian would sacrifice story for graphics directly, or even indirectly if they can help it.
There are various marketing forces that discourage large, involved non-linear games:
The dialog was restricted in BD to keep down translation costs; that may or may not be a factor in DD2.
The addition of multiplayer adds some practical considerations to quests. Either the multi-player mode will have simpler quests, or there needs to be a relatively elaborate method of keeping track of who does what, and letting each person keep track of that information (or there are restrictions on how far players can separate, so they all get the same cut scenes, dialogs and quest updates).
