well i tried the swaybars, and boy did that make a difference. I had both vehicles setup, one with, one without, basically same setups, though the car without swaybars was using a slightly lighter rear spring, and also lightweight diffs but heavier center drive shaft.
Anyway, the vehicle changed direction much faster with the swaybars, but traction was not reduced. it really felt "right". The other car without would bite more into the turns.
This is with an STR4 Pro II sedan.
Another driver using a TC5 also liked going with the sway bars.
I managed to TQ, but had motor issues.