I wish they did Freakazoid now that we've got more adult cartoon shows like the stuff on Adult Swim and FX with Archer. The humor they were going for on Freakzoid totally went over kid's heads, but I fucking loved it since I was a fan of stuff like F-Troop and Police Squad. I heard the heads up at Kids WB got scarred because they got a lot of fan mail from prison inmates (which is actually a joke in the second season) and other adults and not from kids. I was happy that they did let them have a final episode and not pull what Nick does and leave them open for endless reruns.
Animaniacs for me got stale in the last few seasons. It felt like they were stretching themselves way too thin with the jokes. It was funny the first couple of times that The Warner's would go back and time and screw with a historical figure, but they kept doing it. Also, if a Rita and Runt skit came on I pretty much changed the channel till the next cartoon came on. The only one I liked was when they did the crossovers and had Rita with Pinky and Runt with Pesto. The Nostalgia Critic did a really good interview with a lot of the writers. If you haven't checked that out yet, make sure you do.