Some lowering and stiffening is good, but too much makes things worse. Too much lowering generates poor suspension geometry that lowers the roll center too much, thereby lengthening the lever arm between the roll center and the c.g. to increase the roll moment that increases lateral weight transfer due to body roll and increases changes in suspension geometry to actually make handling worse (note however that simply reducing overall wheel/tire diameter beneficially lowers the c.g. and roll centers without changing the linkage geometry). Moreover, too much lowering leaves inadequate ground clearance for everyday use. Too much stiffness actually reduces grip and makes for an uncomfortable ride. Too much change in stiffness at one end of the car relative to the other, or stiffness not matched to the static weight distribution of the car, will lead to excessive understeer or oversteer. The right amount of lowering and stiffening can optimize the geometry of the suspension links so that the car transfers less weight for a given amount of roll, as well as rolls less in response to a given set of forces to help maintain better tire geometry for good grip.