What are the circumstances? Error correction while turning and high speed turning? I will mention, most production cars are designed with understeer because of the ease of error correction. To further change the balance of the car to have even more understeer would be driver preference and how you drive a car. For me in a FWD car I'd want to be as close to balanced OS/US as possible because it preforms better in tight undulating roads/circuits. I would rather sacrifice power before the apex than after, for a quicker exit. If my car is pointing in the right direction at the apex it's insta-throttle and not having to wait for the back end. But that is just my preference.
If you remove the FRONT sway, you're going to get OVERSTEER, which is what he was going for, AFAIK. Its going to give you much better rotation in extremely tight courses (or on dirt or gravel, I suppose).
Getting pointed in the right direction actually allows you to get on the throttle earlier, which allows for a faster exit speed.
Now there are diminishing returns at some point. And in reality, you're better off having a well-balanced car that systematically controls for understeer in the long run. Trailing throttle oversteer is often NOT the fastest way around a corner (although its a TON of fun).
But in a really tight autoX or off road, if you just want to be able to get the car to rotate, removing the front sway is an age-old "technique".
