Swaybars help reduce traction? I'm not sure about that, why do performance car drivers replace stock swaybars on their vehicles with harder aftermarket ones to help reduce the understeer in their vehicle to help them turn sharper and get through their racing line quicker. The only time a hard swaybar reduces grip rather than help add grip is when the tire compound is a hard, long-wear compoud, yes, it will reduce traction greatly, but at the same time high understeer is produced when the vehicle actually has quite good traction.

Though I agree with what you said in your previous post, a swaybar will help in drifting. I remember from a while ago, that swaybars are great with helping provide traction, yet, if the limits of traction are broke, a drift occurs, but it is usually difficult to re-straighten out a vehicle after that (real vehicles)

So yes, a sway bar is a good tuning aid when drifting, just as long as you have the proper setup and you're using the proper rated swaybars on each end