Flex-Good or not?
First lit me say, I'm glad I'm not competitive so I don't have to worry about stuff like this....
But I would doubt that it would make that much of a difference in most instances. Going back in time, we had stiff chassis with straight axles and no rear suspension and none or tiny little springs in the front. Then flexy chassis out of fiberglass or plastic, on to T-Bars and links and independent in the front and rear.
Seems to me that with every improvement, the first thought was that for the suspension to "work" the chassis neded to be stiff. Now it seems across most classes and scales flex is a very important tuning feature.
It may be improtant at some level that the suspension mounting points are on two seperate planes but I doubt major changes would be necessary to compensate for this if any at all.
JMHO ;-)