Fair points Matt, and I don't disagree with your premise that everything will break.
I look at it this way though. The rover axles are the worst of most comparable offerings. And that's more so when you look at what the D110's and D1's were advertised to do...load them up with a ton of stuff and haul over any terrain. I think we'd agree they were under-built for that.
However if we use the armored car variants of the Defenders as an example we see a pretty good option build out that addresses the weakness in meaningful and reasonable way. Dana 60's front and rear. That would have been a great option to offer as standard on all 110's and 130's. I think with that config there isn't much I would find as a big weakness in the overall vehicle package. Sure, there's always something one can point at as a dislike, but overall its a pretty strong vehicle. Compare that to a D1 used on the CT's with LR axles, or a Defender with LR axles, and you've got an entirely different, and more vulnerable, vehicle.
I don't see the Grenadier being something I'd ever buy, but I think they'd serve themselves well to at least offer something similar to that Dana60 front and rear setup. At least as an option for buyers who want to use the vehicles and put them through their paces.