For me the second best thing sim-wise to LFS is the Historic GT mod for Rfactor, its fantastic fun with great force feedback and the cars are a real blast to drive, the only problem is you cant just jump in an online game as it is mostly leagues.
Wouldnt it be great to have something like the lotus escort from the 60's in LFS??. It wouldnt have to be a licensed vehicle , just with 60's style drifty handling, 1968 XRG anyone??

I know its a canned effect but it would be good to have option to have the engine vibration effect in ff a la gtr2 , gtl, it adds to the immersion for me.