My immediate answer - Sonic fans.
I don’t really know what Sega and the Sonic Team can do anymore to make these fans happy. They’ve revisited the classic formula a few times, they tried going modern routes, they tried 2-D sprites in some entries, they try going full 3D and whatever. Nothing ever seems to be enough and that’s even when they’ve tried listening to the fanbase a few times.
Nothing seems to matter, regardless. The fans will find something to be upset about with Sonic. Anything.
Dont mess up story telling and established characters an they’ll be happy Dont mess too much with the established lore, that is like bringing a sand storm to the desert. Yes it will sturr up some sand but eventuelly it will settle when people think about it. Mediclorians for example. Huge uproar but if you start thinking about it, it doesnt contradict established lore and even makes sense that a futuristic civilisation with some discovered energie would find a way to detect this energie connection to a person