The half-hour episode format means that each of the "what if" questions doesn't really get much time to be explored. Each episode feels like you're rushing through it, going through a bullet list of: here are all of the differences, try to catch the Easter eggs, roll credits. I have to confess that part of the problem might b my bias against animation - I just don't find it as compelling as live action - although I must admit that the animation is quite good. The best episodes have very simple premises and don't cover much ground, thus using the 1/2 hour format to its best extent. (As far as that goes, I think the zombie episode really hit it out of the park.) But overall, give me a live-action show any day - and slow down the pacing!