GenerationofSwine
The old She-Ra looked like an adult, not a child. And the reason this is important is because she fought Hordak and the Evil Horde. And she did it to be a hero and save Eternia from Evil.
This She-Ra looks like a child. And you can't have a child fight and go on the same kind of adventures that you can an adult. Even when it's animated you can't have a child do the same dangerous things an adult does.
So the result is that this She-Ra, the 2018 one that looks like a child doesn't really fight to be a hero and save Eternia from the same evil menace. She's depicted as being too young to do that, so instead she goes on stupid and silly little adventures.
And that isn't She-Ra. She-Ra was intended to be "The Princess of Power," she was...