The problem is that IIRC Ford only have that crappy Haldex type 4x4 available at the moment, not a Torsen type like Subaru.

The haldex stuff is shite on a race track as it only feeds power to the rear wheels when the fronts start to slip. Therefore the car still handles like a FWD car with a very "understeery" setup, but improved traction. Thank god they were brave enough to dismiss this kind of alibi 4x4 in favour of a radical FWD concept.

The other option would have been to develop a proper torsen 4x4 system from scratch but then the car would have probably broken the 40 grand barrier...