I believe when you stop the rear from leaning, you stop what little weight is in the rear from transferring to the outside tire. The rear stepped out much earlier with the rear bar.
Not sure if I understand your point, but a rear bar for instance will decrease the loading on the inside tire, AND increase loading on outside tire, resulting in less total axle grip BECAUSE tires are LESS evenly loaded, and this results in increased over steer, and if not matched better to front roll resistance, handling is perceived to be degraded.
JCC You got it backwards. You want your weight to transfer to the outside in a corner. That's where you need the grip, not the inside.
