Moving 25# is enough that you should see a change.

When cars start doing odd stuff, springs, shocks, joints, etc need to be verified. None of this stuff lasts forever.

Spring seat heights, AR bar tweaks, moving weight, wheelie bars are other ways of changing the corners and/or making the car go straight.. I typically try to use a minimum of preload in the suspension since it creates bind. I want it to be free and use preload as a fine touch up. If I have to use a wrench on a bar, I may go back and do something else to move a few more pounds.