IMO, the Simpsons translated into three dimensions just looks odd. I never liked any of the figures (except Mr. Burns, who seems to look decent as a figure)... everyone else looks too bug-eyed.
I'm in the camp of the simpsons going downhill after season 8 or so, with a majority of the episodes after season 11 to be unwatchable. The stories and character development got a little too ridiculous, the humor became less subtle and far less clever. After the advent of Family Guy, I could barely tolerate the resulting episodes of the Simpsons, since they began to incorporate too many random manatee pop culture gags in order to counter the ludicrousness of FG. Did anyone see the mystery episode a few months ago where Nelson was investigating the death of Martin Prince, and for the final 1:30 of the episode, they reproduced the opening credits of Columbo? Horrible... And the retcon of the Marge/Homer love story? Blasphemous...
I read somewhere that one of the showrunners a few years back never really watched the Simpsons, and the result was the de-evolution of Homer to a truly stupid and idiotic character when compared to his classic slow, ignorant, yet lovable persona.
I also bet the current writers of the show are Harvard graduates... funny that early in the Simpsons' life, Roger Meyers made fun of Ivy League grads who thought they could write comedy...