Yeah I'd like one, it's a game I actually really enjoyed, playing it again now. Free roaming out of the vehicle would be nice in a sequel, but the shifting is a must.
I hear a lot of people asking how they can add "shifting" to the sequel and the answer is simple, just add it. I don't buy games for realism I buy them for enjoyment. Before this game I never played any Driver, if the next one was to come out and he had shift powers in real life because of his head injury I'd be fine with that because... it's a game, why does it have to be realistic.... it doesn't. I've played games with guys that have super powers, magic, future technology, all sorts of things.
Look at Metal Gear Solid, it tries to stay in the realm of reality but has vampires, clones, super aging, possession (which later isn't possession), futuristic technology even though it's not the future... even full fledged magic... at one point they say it's technology that did the magic the next it's really magic, and you know what... no one really cares, the game was fun. Even Saints Row started of as real now they are fighting zombies and aliens.
The bottom line to me is, who cares as long as it's fun, Driver isn't some deep seeded main stream for all integrated series that must be hard fastened in reality. As stated this was the first Driver I've ever played, and the sales would indicate that was so for a lot of people, the shift mechanic was probably a big reason why. If the next one has shifting I'll get it if not I probably won't. Tanner says it the best after his first shift talking to someone "I'm the Driver", make him "The Driver" with the ability to shift into people and be done with it.