more negative camber would surely elliminate understeer.
-1 degree is standard
mine has -1.15 degrees on my last check since lowering. when i fit my tt lower arms i should be able to get -1.15
although ive been offered H2sport top mounts in a swap which im mighty tempted in. they are 4 way adjustable to either -0, -1, -1.5, -2 degrees.
But i do agree very much so that after lowering you need geometry sorting. my cornerweighting made a huge difference