As a long time BC fan (PGR2 and 4 are some of my favorite games of all time) this is a mild disappointment. It does lots of clever things, it gets a lot right, and it's built from a solid foundation on a technical level but it's just completely soulless.
Contributing to this is some really simple tricks I think they've missed; Why can't I customize my numberplate? Why is the character in my car really detailed when I can't customize their look? I'm not massively into the UGC stuff, but they've clearly done most of the leg work, so why they haven't taken the extra step I don't know.
A lot of the game has a very strong design by committee feeling to it which ends up leaving it feeling a little dull and watered down. They have looked at other games, and copied what has sold which I really can't blame them for given the sales of their previous titles (despite them being excellent). So you get the perks/leveling system from MW, right down to prestige, sorry 'legendary' ranks. The single player gets a voice over from a woman who sounds like she might just have sex with you if you win, just like NFS. The whole interface has been designed to look 'cool' but I think if often comes off as trying to hard.
The multiplayer can be great fun, but it can also be incredibly frustrating, until you really nail down your weapon/mod strategy you'll suffer from 'Mario kart syndrome' of going from first to last on the final lap.
I also feel the game play is weighted too heavily towards weapon management and not enough towards driving ability. What I mean is, if you pick up the right weapons and fire/place them in the correct locations, you may as well not bother much with a racing line; just skirt the barriers.
Still, when it's all working together correctly, it's a fun game with some cool ideas. As I read back through this it seems more damning than I expected, but I've put a good numbers of hours into it despite having other things to play so it can't be that bad