I didn't mentioned tire I planned to swap into in the beginning is worrying exactly the response like this. People tends to be far more excited to talk about product than how to use/maintain them. I didn't meant to discuss tires much, BFG, Michelin, or whatever, AT or not, it doesn't matter. My original purpose is to discuss the tire rotation practice. It should be a topic fairly independent from the rubber you plan to use.
Now having that said, the tire rotation discussion is for a healthy use/maintenance of our equipment. Yes I can keep my spare shining new, but when I have to use it together with heavily worn tires it sometimes works horribly, damage the vehicle even for some AWD cars like Subaru. It doesn't really matter how likely I will use my spare, but more about what to expect when I do need my spare. I guess the typical scenario I had in mind is when I got a flat in the middle of nowhere, and I don't want the option to repair my tire right next of the pavement whether it is a 140F hot desert in Death Valley or -40F blizzard in winter Montana. If I have good traction on the road the minor diameter difference might be identified as slippery (?) by the MTS? If I have bad traction or mixed condition of the road would diff lock still function right or it would cause some kind of jittering?
Just think about driving in that condition for hundreds of miles before you have the option to really address tire issue. If we can manage our tires better it might never even have the chance to happen, however the rarity it is.
As for tire, there are quite a few KO3 thread here. An all-around tire is what it is, for the good and for the bad. For me it is just a cost/logistics management for how to use the right rubber to the right terrain. I made my decision to simplify everything into one set of tire, 4 or 5 of them, instead of keeping 2~3 sets of tires and wheels each optimized specifically for efficiency, weather, and/or traction. I don't really have brand loyalty or even passion to the rubber though. I want simple and worry free, that is the core value proposal I see in Land Cruiser.