We wouldn't cut anything. Just the boxer would get changed with an inline 4. All else remains the same (more or less). And the FXO could be kept more factory like - FWD. True. Alfa did compete in DTM (and ITR) with an all wheel drive 155. Don't know if they made AWDs back then. But doing that would lower the number of basicly the same cars, like it's with the XRs.
About the LX8 GTR, sounds fun, sure, i went down that road, but when you think over, the LX is just way too small to compete with normal cars. Make a small kit car simmilar to a prototype (Radical anyone) and put the LX8 GTR that XCNuse made against it. That would IMO be fun. 2 small, fast, downforced cars competing against eachother.