hmmm 1.5-2 seems like a lot...
When you lower the car, especially with camber kit, you have to be prepared fr excessive tyre wear. You can always correct the camber back to neutral so you can get even tyre wear but the benefits of camber arms are negated.
Correction, Incorrect TOE In/Out causes uneven tyre wear, not Camber.
camber does effect tire wear cos wen u lower ur car the top of ur wheels camber in mean the tire makes more road contact wit the inside corner of the tire rather than the flat suface of it.