My reply to dumbing down relates to how the information is related to perception.
When I started karting, dual purpose chassis were the norm. And, basically all there was. Chassis setup for oval racing was related by how it was used for lefty/ righty racing.
This has carried into the manuals you have related to.
Lto racing has evolved past most of that. Not because the chassis have changed, but because the theory of operation has moved on.
If you note both in troubleshooting guides in the manual, and on other sites, there are some adjustments that don't make sense. Not because something mysterious is happening, but because the way we are taught to think about these things is misguided, by the past relationship to lefty/ righty racing, and the need to unload the inside tire in a turn.
Here's my tip.
Disregard any information that talks about unloading the left rear.
Think instead about how these adjustments affect loading and unloading the right rear and the use of stagger to maximize lateral traction in the corners. Think of the left rear as always having traction.
Adding or subtracting weight from the right rear is the major effect for handling on modern lto chassis. Most easily seen in high cross setups.
Look at the troubleshooting guides with load and traction on the right rear in mind, and it will make more sense.
Use Occam's razor as your guide.
Yes, I have those manuals, as well as McCarty's hard to read tome.