Russ, I think you have it correct. The true question is whether the membership wants to see a change in the direction of the design and build of FF/FC cars. Given the significant steps taken to insure that older engines were not relegated uncompetitive in these classes one has to question as to how "liberal" the chassis rules should or should not be interpreted. This is not an issue of the legality of a single car, but rather one that goes to a "diametric change in the DNA of FF/FC car construction". (quoting a former FC National Champion)
FWIW, note that there is no limitation on the number of engines permitted...