The 64 RR, so far, seems to have more of a magical feeling than mk8's, i'd still have to wait and see for myself. Regardless, I'm eager to see how mk8's rainbow road plays. It seems different than any course we've played before, especially with the space center in the middle thats like a roulette.
When I play MK7, i actually prefer the SNES RR since its just a lot more fun to whip around on, even though mk7's RR is better looking.
Also, that Dolphin Shoals track is classy, I almost feel the need to rent a tux to feel comfortable while playing it.
Regarding Battle Mode. It would of been great to see a course where you can go a safer route, while riding on the wall that circles the track, but other players can throw shells that go up the ramp, and bounce around vertically, countering that safety. It just seems if Nintendo made new arenas, they would want to make 8 new ones, and that would be a huge under taking, and probably couldnt make the deadline. I've yet to play Battle mode online in mk7, always races, so im not really affected by it. It's still there in some form, and I'm sure ill jump into it every now and then.