[color:"orange"]Just apoint but I cant see why they did it[/color]
In addition to the technical benefits of 3D (customization, more variety of movements), 2D just does not scale very well. In 2D each animation is a series of drawings, which take up much more space compared to 3D models. If you want to add a different attack move or a different creature, it requires a new set of drawings. In 3D, once you have a basic model, different variations of form or movement are relatively easy to make (a town of a hundred unique elves would be much easier and faster created in 3D than 2D, and take up much less hard drive space).
There are also marketing forces involved. 3D is perceived to be better than 2D, so that can have a large influence on how interested publishers can be in a title, how reviewers score games and how likely people are to buy it from looking at the box. There was an adventure game (forget the name) discussed in one of the chat forums, where the developer simply could not find a publisher willing to publish the game in 2D. Despite the fact that the previous game in the series looked fine and a 3D engine would not add anything to the gameplay, they had to switch to 3D to get it released.
For RPG games, there are a lot of benefits with 3D, and few downsides. The image quality of 3D models may not currently beat hand tweaked 2D animations, but it is getting pretty close. The lowish polygon count characters in BD didn't look as good as in DD (though I only really noticed the difference if I zoomed in), but they will more than likely be much better in DD2. Eventually, with real time reactions to environmental lights, shadows, wind, etc 3D models should exceed 2D in image quality (think
Final Fantasy vs just about any other animated movie).
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