"Personally, I just took the waist belt clean off. I also got rid of teh valise straps, and replaced them witha s ingle bungie cord"
The waist belt is not met to be used all the time. When the load is 'wearing down' on your shoulders, fasten the waist belt and reach back and through the pack on to your hips for a while giving the shoulders a 'break'.
As for replacing the valise straps with bungees, how do you 'suck up' the sleeping bag and pad? I use the V-straps to suck the sleeping bag and pad into a neat, compact fit under the pack.
I don't find the '82 ruck that uncomfortable. Try to keep the load around 35lbs I've packed sheep, Elk, Moose on a 'Trapper Nelson' pack board. After that, the '82 is a 'Cadillac'.!!