Played the demo a few times this morning again before work. Got a bit further along the track than I did before and also found out how to change the siren tone, but I still can't help but be disappointed. It feels much more like HP2 than it does Most Wanted, which in my mind is a large step backwards. Most Wanted did well to immerse you in what was happening without breaking up the gameplay, and the radio chatter was better too.
I'll probably get it, but not on release at full price, and I'm still disappointed that they didn't do more with it.