Double Bogey
It would appear that its sentence one and two that you take exception to.
The shaft is subject to cyclic loads generated by the meshing of the pinion gear.
This information was presented as a matter of fact to illustrate this section of the shaft is just not there to drive the oil pumps.
These forces are greater than the previous versions due to the 17% ish hike in power.
I’m not suggesting this is the cause of the current problems, but any load taken by the 2 roller bearings will be increased with an increase of power over the 332 instalation.