After reading the review, the all encompassing word that comes to my mind since they've started showing the game off:
"Underwhelming"
I, like many other people it seems, was hoping that this fresh start, "ground up" rebuild, etc etc meant it was going to feel/look like a new age of Forza so to speak. From everything I've seen, this looks like it could've just been another entry in their former bi-annual release schedule. It comes across as iterative and not reinvented.
Will I try it? Probably. I'd really like to have some self control and not buy it at launch at least in slight protest of the game. But if I know myself after all these years, I'll cave, buy it, play it just so I can know for sure myself that.. yeap, its not what I was hoping for. And then stop playing it after a week.