In the bike CFG files we have the ability to tune the stiffness and damping of the chassis, to give the bikes different behaviour and feel from the chassis.
Well a key part of modern grand Prix racing is to perform similar development on the swingarm, giving different stiffness' and weight distributions etc to control how the rear wheel reacts under load.
Having a new section in the cfg such as
Swingarm:
Stiffness = X
Damper = y
Maybe under the 'rsusp' section, as in the cfg that covers the swingarm mostly anyway.
Could introduce a little bit of extra fidelity for the development of mods, and increase the accuracy of their corner exits.
Granted it's a small issue not having this, however, it would just be another extra little thing to utilise.