Well, obviously I watch this show and I'm like 15. Even though most of the Reviews has reasons to why this show is "stupid," all those reasons don't affect the actual concept.
I don't see how inappropriate the "language" is. Like, 4th graders are playing Black Ops and Call of Duty right now. So you're saying just because of some small bit of immaturity is a wrong message, but have a society that allows children under the age of 10 to play games meant for Adults?
Anyways, I know the animation may not be at its best, but you ever heard of Cartoons? Hard work in drawing? That not everything should have to be perfect?
Rob Dyrdek's pretty much like rich, dude. He wants the show to be animated like that on purpose. That's makes the show unique.
As for the character designs, why don't you draw them yourselves? For years, I have tried to imitate that style, and it's more difficult than it seems. Also, the artist is left-handed and art is art. Along with that, these "stereotypes" are what Rob wants. He exactly mentions that he did this on purpose.
From what I see, the cast has quite a good variety from each stereotyped character. For example, Jay Jay may seem to be the tough guy, but he's polite, a germaphobic, and wants to grow up to become a doctor. Or how Emo Crys wants to grow up to be an artist. Maybe there's a fact that if Rob Dyrdek dropped out of high school, then Lil' Rob will pretty much do the same. Any other kids shows that encourage kids to be themselves and decide who they want to be?
Next, I'd like to mention that the cast is mainly consisted of boys, which is actually a good thing. Most shows shove in some girls for purposeful romances. This show doesn't dp this as much. Sure, sometimes they get attracted to girls, but these are middle school boys, what else did you expect? Either way, they seem to treat the females in this show quite respectively and they rarely make comments on "(etc.) like a girl!" Another thing to add, the female cast is quite strong, Lil' Rob's mother is a skateboarder herself.
And here's something to consider, unlike most normal cartoons, Wild Grinders always supports variety and the reality of actual life. (Aside from the unrealistic ideas, but that's for the show's story). This show teaches kids they don't have to be with kids that are the same as them. That some endings aren't always happy, but funny. That it's okay to laugh and have fun.
Overall, the concept and message is quite well done with its variety. Make Wild Grinders positive and doesn't leave terrible feelings afterwards. However, to make the animation in PSG Style would be quite fun to see.