that is fascinating.These cars are faster without the rear sway bar. I disconnected my adjustable completely 2-3 years ago.
We did it to brother's racer at the advice of a pro racer buddy sharing car at event and verified it with the lap times. Same pro driver drove mine and made same suggestion on a long road tour/event weekend. So i did and its more 'hooked up', less twitchy coming out of corners. They like to roll.
But, you have to look at the total sum of ALL your bits....