Ive seen oil drive hex worn almost round and all that torque runs through that keyway. Had SG rear axle splines twist almost a full spline right out of the carrier, stuff happens.
So are you implying that the crank gear wobbles around on the crank snout ? Whats the clearance difference between the 3 ? I have torn down many 100,000 mile engines and don’t recall any weith wear . Crank or cam ….