Liking the visuals (and the catchyness of the music, not just We are Number One) is 100% why I want to see that show. I love animation, and the cartoonyness and hyper-designedness of it is really appealing to me even if it is live action. I'm aware that it's going to be a silly show for babies that is going to push some moral on me at the end of it all, but not everything a person enjoys needs to be a bastion of intellectual stimulation. Or political correctness.
The worst shows I have ever seen have been shows about pushing an agenda rather than to entertain, but pushing an agenda is all these people know how to do, so they take something that's meant to be fun and add their own agendas to it. Nobody is just allowed to have fun.