God Sonic needs a total reboot. Just go back to getting from point A to point B, offering multiple but closely connected routes, using speed and momentum to zoom through obstacles like loops, walls and jumps, dodging spikes, pointy enemies and (occasional) pits, jumping on or spinning through robots to turn them back into little animals, fighting Robotnik at the end and freeing a further bunch of little animals in the process. Get rated on your speed and rings. Bingo. There's your game.
It doesn't need a hub world, RPG-style leveling or equipping, extra characters, a story, CGI, voice acting, a damsel in distress, or weapons. Just 60fps, color, speed and challenge, and a little bit of personality *implied* by the character animation. Not forced down our throats with a god-awful script and VA.
I dare you, Sonic Team. I DARE YOU. :lol