You are right, I wouldn't go that far 30-40mm is enough, and all sort of related problem turns up, the bushes and balljoint also. Not worth going unless you choose coilover set up
im on ebach 35mm drop..18" rims rub at the rear so streched the tyres..and now finger gap.. at 35 mm front still sits quite high.would like for it to be lower..I think 50mm would be just right