I'll never understand the "I don't want the show to tackle any controversial or heavy topics" attitude. I know the word "political" is something of a swear word on this forum it seems but I'd at least like to point out that arguably the greatest cartoon ever written (and especially its sequel) tackled some, at the time, pretty heavy and controversial subject matter. I'm absolutely not saying G5 should try to be the next Avatar and I'm certainly not expecting it to be, but if i were to hold it to the same standard as G4 I'd expect some heavier and touchier topics to be dealt with. If it's not too grown-up for sesame street it's not too grown-up for MLP, and sesame street has dealt with LGBTQ+ people, race, abuse, autism and other disabilities.
That being said I don't think I can hold G5 to the same standard as G4. G4 was honestly something special and I can't imagine I'd enjoy something labeled as MLP if it doesn't have that same attitude and charm G4 had, I certainly couldn't get in to anything 3d animated.