This "intended audience" stuff sounds more like an excuse for a crappy show to me. Spectacular Spider-Man was completely kid-friendly and a great show. Same goes for Avengers: Earth's Mightiest Heroes. (Season 2 went downhill though, in my opinion.) I quite enjoy shows that are made for kids to enjoy. Not so much shows that are made for only kids to enjoy.
(Not meant as an insult for anyone who likes Ultimate Spidey etc.)
I actually prefer the insane childishness of Superhero Squad to the middling childishness of this current crop.
Agreed, on both parts. You can have shows that appeal to young kids, but are also intelligently written. And then, you can have the stuff they are pumping out now.
That isn't to say that they all have to be grimdark/serious. I personally love shows like Super Hero Squad and Teen Titans Go!. Both of them are far from serious, but they do a good job of being a mix of insane and funny. Both have jokes that are clearly aimed at older audiences (for example, Teen Titans Go! has referenced Webster and Small Wonder, but they appeal to younger ones as well.