Gday from California

You are correct on all statements, err well I think

That method of allowing the CV shafts to slip is what
I'm going to use and eliminate the CV Cups, I don't think
it has been done yet, but it has been talked about.
Double cardian will take up too much room, but I have
thought of that also, I don't think it will work on both
ends of the front shafts, as there is no support, as with
a drive shaft, on end is a single U-joint and supports the
shaft without wobbling
I'm also working on replaceing the struts with shocks, and
building a self indexing system so no matter where the wheel
is, tires stay
[] [] with the ground

A drop kit is going backwards (front to back) in the clearance
direction, if you drop the diff, it still is in more danger of being
hit, regardless of larger tires, I want my diff high and safe with
more travel and clearance, I'm also going wider total of 4 to 6
inches 100 to 150 mm but I don't know yet where I will end up
Cheers Mate
Wild