After I lowered mine, the only alignment adjusment need was the toe settings. Camber angle remained within specs with just a minor increase on the negative side to about -1 from 0.75. I am definitely sure I didnt need those adjustable camber bolts but they mounted them anyway.
As for the BMR panhard bar, Im not sure if it was absolutely necessary either. Lowering 1-1.5" shifts the body so little that it is almost impossible to notice it unless you measure it. Now its aligned very precisely with the adjustable bar but still, would it really matter to adjust to 1/10 of an inch precision?
I think eibach pros offer the perfect lowering for our cars. Anything below 1.5" causes problems with fitting wider tires and needs further adjustments to suspension etc. and imho, it doest look better either.