Weight Transfer and Suspensions

I'm saying a stick car should have some type of pinion snubber just in case a spring perch breaks or something so the axle doesn't completely wrap up but it shouldn't actually hit the floor under normal circumstances because that would be defeating the purpose of the SS springs.

With non SS springs having the snubber adjusted to hit the floorpan on hard acceleration is desirable though correct? because instead of the SS springs doing planting of the rear end downwards and the body lifting it would be the snubber doing it?