Help with lowering springs

[Dr3K0]

Hi guys, I’m in the middle of a dilemma.

I installed an H&R Cup kit to my 135i and it looks awesome but I have some issues. I installed some VMR 701 and the car is rubbing, as expected. Took the car for fender roll but it still rub if I corner too hard or somebody is on the back.

After some thought it seems to the rear compress a lot it almost get close to the wheel. I believe the rear shocks are under damper for the springs. I was thinking to buy the koni yellows and set them to a stiffer setting to control the damping travel.

Am I correct on my idea?

Other hypothesis is that the rear springs for some reason are softer than should be.

I was about to put my stock suspension back but stop and think about this issues.

All help is welcome.

Thanks

Dr3K0