Blair, this is a persistent situation, and one that doesn't often get addressed honestly by either "side."
It's true that Land Rover's QC is in the garbage. No one can reasonably deny that. I often hear the argument, "Oh, they're only unreliable if you just drive them on the road. The harder you use them, the more reliable they are." C'mon. And yes, I know there are Disco owners out there with 200,000 miles on their trucks and not one visit to the dealer. But we all know that's statistically a fraction.
The New York Times recently published a graph of vehicle makes according to long-term reliability. Land Rover was so far off to the left that a friend quippped, "It's like a class picture and Land Rover is the kid with really bad B.O."
Many of the problems experienced by LR owners seem to be ancillaries such as power window, lock, and mirror systems and sophisticated ABS and traction control systems. The simpler Defenders seem to do better than the Discovery/Range Rover models. But there's also no doubt that all Land Rovers suffer more than their share of early major component failures such as transmissions, and degrade generally faster than they should. When I read about East Coast Rovers doing a frame-up "restoration" on a ten-year-old Defender 90, I can only shake my head.
However, and it's a huge however, Land Rovers instill an enormous amount of customer loyalty, and this can't all be attributed to image. The fact is that when Land Rovers work they work better than just about anything else on the road - as you obviously know. They are inevitably in the forefront of developing new technology. Range Rovers had all-coil suspension in 1970 - it took Toyota over 20 years to climb on that bus. There is no manufacturer better at combining comfortable accommodation with true off-road ability. That might be why so many owners are willing to put up with the problems.
But I don't understand why LR under Ford has not been able to improve - except that they keep adding more and more complex systems. It's as if they're trying to get out of the hole they're in by digging another hole next to it and filling in the first hole with dirt from the next one they're digging themselves into . . .
It could be done. Jaguar did it, accomplishing one of the most spectacular turnarounds in reliability in automotive history. But I don't know what it will take to spur it.
I've often said, if only Land Rover could subcontract Toyota to build their vehicles, they'd own the market.