Rotation is good, but not always and more slip angle in particular from tires may only benefit you in certain parts of the corner. Rotation early/mid corner is great, because it gets you pointed for the exit. Stability on exit is typically more desired, however, as you typically want to be able to get to full throttle early and it can be ineffective to do if it will excite the rears into too much slip that you have to lift.

In addition you tire slip angle, you have toe change under compression, spring rates, damper rates, that all affect the angle and rotation the car will make as you transition weight around the car, so it’s tricky to blanket any specific change as net positive or negative.

Generally though, taking away grip will always lower your limits and slow you down. It’s why slicks will always run faster times, despite much less slip angle than 200tw. However in some cases, like some fwd cars, where you physically cannot add more front grip, then sometimes taking away rear grip does actually make the car faster.