Just to make a quick point. Coil springs were a thing of the past, then leaf springs took over. Then coil springs came back with 4 links in the SUV market. Now, the 2015 Dodge full size trucks have 4 link with coils. (I towed my blazer ~1800 miles with one, drove nice)
Soooo, my point, the rear trailing arm design was good. Just a PITA for gas tanks/spares/exhaust/etc. I can't wait to ditch my 2001 S10 for my 1968 C10