The same went for the newer episodes of Dexter's Lab. Now...those episodes really SUCKED altogether.
Dexter was the most popular Cartoon Cartoon back in the day, which is why they ressurected him for new episodes... they probably wouldn't have sucked if Genndy Tartakovski and his team did the new episodes, but they were working on
Samurai Jack at the time. Not only was the over design and animation for the new episodes lack-luster, but the stories were inconsistant with the original episodes, like Mandark talking about how he first met Dexter when he still acting like his parents wanted him to (and still went by the name of Susan), but one of the very first episodes clearly showed Mandark as new student in Dexter's class who automatically clashed with him. Same with how Mom and Dad met - both versions of the show told different stories.
When a show is put to rest, it's a bad idea to try to bring it back... it just doesn't work. A lot of fans wanted one more season of
Courage the Cowardly Dog, but we never got it... if they did another season today, it wouldn't be right, as the show has already be put to rest, and bringing it back for new episodes would be awkward and confusing.