some minor flaws...
You need to work on Lip Sync and timing. I suggest recording all your voices first, make sure all your timing is right on that, then start animating. If that's what you're doing, well, you just flat out need to work on timing right. Pauses are too long. And it wouldn't hurt to let your characters blink every once in a while. It's creepy having them stare all bug eyed like that. It destroys the stereotypical 50's sitcom feel you're going for here.