Burnout Paradise's open world was completely ass for single player racing. I want to go fast, unlock faster shit, go faster. Events, repeated ad nauseam, spread out across the map randomly, made the act of getting into a race terrible. The same exact shit happened with Tony Hawk, eventually the open world story mode got too big and the overly large map design combined with connecting everything together made the series boring.
You know what Burnout Paradise's open world was good for? Multiplayer. It was great for multiplayer, but I don't play arcade racers for multiplayer. Plus it eventually got boring doing shit with a group of people. There was absolutely no benefit to Paradise's world for single player. The world was too small to take relaxing, long ass drives like in GTA. And yet it was too big to efficiently play through all the races quickly.
Combine that with a fucking abysmal soundtrack and the lame replacement for crash levels, Burnout Paradise was only a Burnout game when it came to the sense of speed.
Mirrors Edge having SKATE or Burnout Paradise multiplayer isn't something to get excited about. Its something that's fun to dick around in a few times and then never come back to.