Outright horrible show.
1: It's racist. Let's just make a character black and give them all the stereotype's of black people in there.
2: No Scooby.
3: They are minors. So, let's make them attractive? No.
4: This show is not for kids, so you are targeting the adults that like Scooby-Doo related content. You reached into a race bag and gave whatever character whatever color you felt like it. Sorry that Scooby-Doo shows don't have many black characters in it, but you can't just up and change something like this to fit some PC fluff if your target audience is the people that grew up with them is different.
5: Not only did you change the race of well established characters, you changed their personalities. It's not "that" big of a deal for a race change, but they should still have the same personalities. Unless you wanted to make this a one off fantasy.
6: Everyone involved in making this should be ashamed of themselves.