2D. I feel that the more strict linear nature of the newer FFs can be blamed on them being in 3D. Don't get me wrong, some of my favorite FF titles are in 3D, but I think 2D gave Square more room to work with and forced the developers to be more creative because of the limitations they faced.

At best, maybe they can go 3D, but stop worrying so much on FMVs and GRAPHIX so much.