Any planing boat can be made softer, even without changing the deadrise angle. The beam is an important parameter here. If the beam is decreased by 10%, vertical accelerations will be decreased by about 20%. However, the boat will also lose side stability by more than 10%.
Petestep can make this design dilemma easier. If a boat uses a Petestep hull, it can be wider, have the same vertical accelerations and significantly increased side stability. Or, it can be just a little bit narrower and with a decrease in vertical accelerations by half, while having the same stability.