Western animation, typically...you might not want to test that on anything from Japan though, ner vod. And even the Western Animation thing is kinda shaky (Family Guy, the Simpsons, etc.).
Just thought I should mention the likes of "Beast Wars", "Avatar: The Last Airbender", and the entire DCAU (Batman/Superman Animated Series, Justice League/Unlimited, Batman Beyond...) as really
good examples of animated series managing to tell intense, mature storylines, while still being kid accessible.
Hell, that's the issue with the whole show. Filoni was supposed to be in charge, with George taking a back seat. Then GL began taking over, and now the show is crap.
Have you ever read the original plans for the show? They're nothing
like what it ended up being. Instead of throwing Anakin, Obi-Wan, and Ahsoka from one battle to the next, it was going to be about a Kel Dor (Plo Koon species) Jedi Master with a young Togruta Padawan (who became Ahsoka) traveling the galaxy together as he tries to train her to Knighthood in the middle of the Clone Wars. It was going to be a lot darker, with more of a grim look at the clones (ala RepCom), a lot of more brutal back-stabby politics (like the Dark Horse comics did), refugees and a look at the lives ruined by the war...basically something waaaay different then the weekly adventure format.
Join us....join us....in the well-written world....that is Mass Effect....by Drew Karpyshyn....
...except Drew kind of abandoned ship for TOR...
If things don't change soon, I expect to see a mass departure from this fandom.
Honestly... it won't happen. It won't. There's just too many people who're attached to it as a brand. They'll suck up whatever latest turd Lucas or his people crap out, just as long as it has the nice and shiny "Star Wars" logo on it.