The springs are just too much for the stock dampers to handle
The Performance stock springs are too much for the stock dampers, let alone aftermarket!
I too went from Eibach springs to MPP Comfort coils. I too should have bought the coils in the first place
I also think the drop on the Eibach springs is too much. They introduced a new part number, so they may have changed it. But that's more subjective obviously. Anyway, now I can set the height to whatever I want.
I do understand that there is a significant cost difference, so I don't necessarily fault anyone for going the spring-only route. But if you are willing to spend the $ for the MPP Comforts, you will have a much better experience.