One flaw I noticed. There is some noticeable rubber band AI. I can see why they do it because if you crash twice it sucks to have no chance of winning, or if you blow by everyone and have a 2 mile lead with no cops in sight then its a little less exciting than if you were in the thick having cops trying to take you down.
But I've hit a few situations where it behaved strangely and noticeably. On the cop side I was chasing down a lone racer, got in front and hit him with a spike strip so he spun out and slowed down. So I slowed down so I wouldn't be way in front (he would just dodge my spikes and I have to ram him to take him down). Strangely, it took forever for the guy to get up to me. I had to practically stop on the highway and when he passed me he wasnt going very fast. Soon as I started to speed up again we got moving in a hurry.
The other is when I got the Turbo power as a racer. Obviously a big special speed boost to pull away from whatever is near you. Or so I thought. Already flying at top speed on a desert straightaway, got a cop in front of me and a cop on me left. I hit the turbo to get around and away from them...only to have to cops stick with me the entire time, never budging from position as if they had all used a turbo at the exact same time I did or something.
It just kinda sucks. There are some neat AI things, though. Cops will not follow you if you go the opposite direction on a highway. I was having a hell of a time in this one race, I'd get to this one section with a split highway and the cops in front would all drop spike strips so there was no way to avoid them and I'd get busted. On my 3rd attempt I made sure to go into the oncoming lane before the split...no cop troubles at all. Which is good because dodging oncoming cars is hard enough.