A comic doesn't have to be funny to be good. However, Erfworld tries to be funny and fails miserably. If it focused completely on the plot and did away with the baby-talk, it would actually be a very good comic.

And example I would like to give is how they stuck the punchline of, "That would have been a good time for it to work" at the beginning of the next comic. It completely ruined the joke for me seeing it in the next comic instead of the one it was intended for. It's all about the timing.