I replaced mine with the Icon leaf packs. The ride was much smoother paired with the fox 2.0’s and even better with the 2.5’s, especially on washboard type terrain. I’m running it without the add a leaf. They’re 33% softer than stock. Haven’t towed anything with it yet, but it handles a full load in the back up to the gvwr very well. I’m sure you’d be better off adding the extra leaf it comes with in regards to towing and squat.
I went with the global leafs. Payload, and towing capacities are equivalent to factory. â…ť" lift over the factory parabolic leaf. Progressive rate, and more travel. Ride is hard to quantify for the springs themselves as I did shocks at the same time. But paired with the Fox 2.0s they are heavenly. A harder hit vs factory on expansion joints, but very well controlled over undulations. Truck rides like a truck now, no longer like a truck trying to be a Cadillac.