As far as having a 3 CD game full of awesome 2D animations vs 1 CD with the same amount of animations but in 3D goes, I'll take the 3 CDs any day. I understand that there are major practical differences between creating characters in the two formats, but I have yet to play a 3D game where the character animations seem as fluid as they are on pre-rendered 2D characters. If anyone can mention off-hand which 3D games have better, smoother animations than DD, please drop a few names as I'd like to check them out to see what you're talking about. Also, the point made about polygons is very valid, as low-polygon characters look horrible when compared to the 2D splendour that is DD. Looking at the screenshots for Riftrunner, I can't say I am particularly impressed. I am definitely of the old-school mindset that says if it ain't broke, don't fix it.
Another thing - who are these people that say the graphics in DD are average? Have they actually played the game? Have they noticed the level of detail that goes into every scene, that nothing seems to have been made out of an RPG-kit (as Fallout and Fallout 2 did, there was a lot of repetition in their graphics engines)? I doubt it. Their standards are either very different to mine or there is just no pleasing them.
Having started this thread it's going to sound really stupid for me to say that the whole graphics question is rather pointless, but I'm going to say it anyway. I like DD for the story and the gameplay and the amazing character development options etc, it just so happens that the graphics are in a format that I have always loved, and have been done with so much love and care that for me, they shine. I guess I am not really going to mind what the devs do with the graphics of their future games, because ultimately they are the same people with the same ideas just making another game, and so there's a good chance I'll like whatever they decide to do.
So yeah, in closing, while I might have reservations about 3D, I trust the devs to do what they think is best, and judging from DD, that "best" is pretty damn good.
Cheers