Not a pit crew, but a more interactive pit section.
As soon as the car lifts off the ground you hit a button combo.
R1, R2, L1, L2 are tire change buttons, Analog right is Rear downforce adjustment, Analog Left is front downforce (If applicable), and X is drop from lift. Possible to have "add fuel" and "conduct oil change" as 2 other buttons.
So you auto drive into the pit, tag get new tires, adjust your down force, Add fuel?, and hit the X to drop from the lift, and AutoDrive out.
Speculation (Dreams/Ideas) for GT4.
GT4 "The Real Racing Simluator"