So I just got the game today. There really isn't much to it. It's fun for a short while.
They are still doing that stupid crap online where you lose points for disconnecting.
The bikes have been nerfed ( the last kart game I played was Mario Kart Wii). They don't have the tight drift anymore. The karts and bikes in general aren't too appealing, and their stats aren't satisfying.
It's a great party game. I'd give it a 7.5/10. Not much lasting appeal for me.