For the standard suspension i think the spring might be alright. Even the compression of abs is not too bad. But definitely the rebounce is too light. Thats what makes the car bounce. Its not really the spring too soft. I keep having my abs stretched out after going over bumps. If the springs are too soft, that wont happen. Its actually out sprunged the abs. In another word the abs are not holding the rebounce sufficienly.
Many people do not understand the difference between hard suspension and hard spring. If a hard spring (or higher rated) spring is installed, it doesnt automatically give a hard ride. If a high compression abs is installed even on soft spring, it will give an immediate harsh ride.
I personally prefer standard or slight higher (1 kg/mm) maintain compression but increase 20% thereabout rebounce. Its enough for daily ride.