As I said, this is meant to be a sort of "Sketch Comedy"; taking it to be a serious continuation to the original series would be a grave mistake.
Why would anyone over the age of 12 watch a "sketch comedy" kids series? Like it works for Adventure Time and to some extent the Regular Show but that's because a lot of their jokes are for an older audience, and generally shows with a broader appeal (like Avatar) have such an appeal because they're a lot deeper than they appear.
When you grow older you'll probably find the terrible child humor to be... childish. At this point they may as well watch like... Community or The Office or some other type of sitcom.
I guess it's going for the typical younger audience but it's a shame to see a show that doesn't go for anything more.