**note - abridged re-quote here...IFS sucks. There I said it. I've had a smaller IFS SUV, it's nice and dandy. I had a 1500 truck too. I now understand the hype about solid axles. Chevy went and stuck IFS on their 3/4 ton trucks too.
That's a big turn off for anyone who isn't a "ME TOO" overlander and actually knows something. You can make IFS perform with a bunch of money. But no one likes fixing a broken tie rod or a CV axle on the trail.
I agree with everything you posted but am curious, from your experience, what is needed to make 1/2 ton GM truck "IFS Perform with a bunch of money." I'm wrestling with the same thing on my '16 Silverado. I've spent hundreds of hours researching the kits out there and the magic will happen when the desert guys make a long-travel, short arm, kit for the GM's. If you don't need 4wd, they're already out there... for consideration ;) Go fast and go far!
Regarding the GM's, the desert racers long arm kits make it wider - not good for trails but great for speed over terrain. "Short-arm" or UCA swaps keep price and market POI (point of entry) low but mechanically do not get the articulation needed for rad trails because of the frame - hub - wheel geometry relationship. I feel like the rear-end can be sorted once you know the load you'll be carrying, chassis squat, tire size, gearing, and shock travel. Order custom springs, overloads on air if needed or for towing, established max shock travel, order king/fox/icon shocks, order bump stops... fabricate.
sorry OffroadTreks, question was in the first paragraph.
Appreciate ya.
DP