I don't understand how any Fraggle fan can actually not like a fraggle. Sure we may have our least favorites, but actually disliking a character? That's kind of harsh for such a sweet, innocent show that promotes goodness and tolerance and learning about each other and the world. Red is my least favorite, but that doesn't mean I don't like her...I do, it's just that I enjoy the others in gradual doses of "more" leading up to loving Mokey the most because I think she's the greatest.
Not having Mokey would be like "The Golden Girls" not having Rose or "Designing Women" not having Charlene or "The Mary Tyler Moore Show" not having Mary Richards, or countless other examples of classic television shows feature ensemble casts (though MTM is more MTm's show) relying on every character to support the show, like a many-legged table. Take one away, and it's just not the same---it doesn't hold up. Case in point: "Golden Girls" tried it without Dorothy once B.A. left "Girls" and called it "The Golden Palace", and the show just couldn't stand without all of the major characters---taking away one of the main intimate group just didn't cut it.