4000 series hub / upright / spidle options

[Three Peaks]

Okay, just to play devil's advocate here-

I assumed from the original post that the loose bolts could not be accessed without removing the rotor, which required removal of the entire front suspension and the use of a press.
Now, after all the headaches, the mechanic has determined that the hubs are not pressed on, the rotors are bolt and and can be removed without the use of a press, and the bolts can be accessed, probably without removing the entire suspension- possibly by simply removing the rotors.

Now, with all this determined and the feeding frenzy apparently over, what exactly are the real shortcomings of this upright? I'm just curious, more than anything else, but I would also like to know what the problem is in case I encounter something similar someday.
It seems like what shortcomings were pointed out could be fixed with some relatively minor modifications to the upright- larger and better grade connecting bolts and washers, anything else?

Bob