I'd like to see wheeler's or a company like that make an "aDD-on" kit that you can upgrade the 84 ruck with. You know, sternum strap, nicely padded hip belt, better padding for the frame (on your back) and a better sleeping bag valise setup (more stable). I am sure it could be sold as a "package kit" and would allow much needed improvements on the ruck while we await the arrival of the high speed, non sparking super duper CTS ruck system (much better than those darn off the shelf rucksacks that outdoor company sell to millions of people each year).
corrected typos.. must stop closing eyes and hoping for the best!!