What did you gain by re-designing it? Drivability or NVH improvements?

Its better for the transmissions lifespan to have some dampening in the flywheel. In the swap groups where most people have 1 piece flywheels, some of the 4 cylinder guys have had premature failure of the clutch baskets. It hasn't shown up as an issue for 6 or 8 cylinder cars yet, likely due to the smoother power delivery, but better to just get ahead of it and take care of it now. A couple hundreds bucks extra for better flywheel now, can save a lot of time/money/hassle later.