As someone who is into racing games this my impression of Driveclub.
Pros
Graphics to me look phenomonal and realistic, Project cars looks a bit to sterile and plastic for my taste.
Good to know the framerate is solid, I find a solid 30fps perfectly gameable.
A good AI is essential ask Gran Turismo
Weather effects
Style is also important so a crash doesn't directly mean game over since you could still earn style points
(And I hate replay function makes a racing game to easy so Thank God no replay)
Great support after launch (In june there will be 97 cars available)
Cons
There are to few cars
Some features like photo mode and weather should be in it day one
Your concern worries me a bit
Shame they didn't gave you a wheel since Force feedback wheels give you a more immersed experience.
Anyhow I've pre-ordered the game and I'm looking forward to it.
Please excuse my (probally) poor grammar