Talking of scrubbing nosewheels have you ever seen the 320's outside nosewheel lift off the ground during a tight turn. Maybe it's even got fly by wire control of the nosewheels when on one engine and in a turn, to prevent scrub. Now that would be cool!
ps I know that NSW steering is FBW. But the lift on the nosewheel is pretty cool! I also think I know the answer is because of geometry and dynamics, but not for sure.