It takes much more time to animate in the traditional, cell animation style than with 3D, mainly because the 3D suite(program) automates the process with bones, skinning and inverse kinetics. With 2D cell animation, the burden is on the animator to visualize test and move each section of the character.
Now that I am with a button animation of a breathing character, I realize that animating with GAP does take a lot of time. It allow to create animations reminiscent of the old days, but the sacrifice is time consumption.
Blender seems a nice platform to start animations. But for time constrains, I am unable to create the animations there. Another year may pass before I am able to animate in Blender though.