I'm no degreed mechanical engineer by trade either, however as someone who has been taking things apart fixing them, rebuilding them, and modifying them since I was in grade school...I get it and like it. As an automation engineer employed by several machine builders over the years, I've been around a helluva lot of machinery of all different shapes, sizes, designs, and types, utilized for many different purposes. All I can say is that the long pins provide more contact surface area between the components to 'spread' the load and the forces being applied versus the pin-point contact areas of two steel balls. If that makes any sense. Think road surface contact differences between skinny tires vs wide tires and hammering on them in the twisties. The skinny tires are going to get destroyed trying to maintain grip (if you don't kill yourself in the process). This is evidenced by the failure pics of the balls. Are the pins a perfect solution? IDK...time will tell, but given what we have and what it currently is, the pins certainly appear to me they should, at the very least, extend the life of the unit if the balls are replaced early enough as oldtech indicates. It has to.
2010 Kizashi GTS, CVT, iAWD (3/10 build date)
2011 SX4 Premium Hatch, CVT, iAWD (12/10 build date)
2018 Mazda CX-5 iAWD Touring
2014 Wrangler JKUW (GONE, traded
1991 Samurai, 5-Speed, EFI, Soft-Top (