I don't know where you get the impression that the 3.0L Duramax doesn't have the power to create wheel hop. I'm running 35s, and the 460fp of torque at 1500 rpm can easily break the tires free from a dead stop on any surface. Additionally, axle wrap isn't just an issue for higher horsepower vehicles with leaf springs. Hitting even minor bumps under acceleration can cause axle wrap and a resulting rebound that amplifies the bounce and jolt. Even up/down shifts of the transmission cause some degree of axle wrap and rebounding.
I'm also looking for some better rear shocks. As you mentioned, that could very well be a contributing factor in my situation. The stock Z71 Ranchos are pretty disappointing to be honest...
As I said in my original post, I've had traction bars on previous trucks, so I do have some experience running with/without them. When properly set up, they don't bind up or make the ride any stiffer, but they sure do help smooth out the typical ride characteristics of leaf springs and make the truck feel more connected and stable.