Hard to tell...
It is different than the rest of the series for sure. That would be a reason to either love or hate it.
After trying the demo, I'm surprised by the amount of substantial content right from the beginning of the game.
Ahh.. I'll go with a boring score: 88.
Edit: Scrap that, being boring is no fun :p
I'll go with a 90. Simply because I feel it deserves it from what I experienced so far.