I have the same trick but white I lift it with the Westcot front and air ride in the back i am telling you the ride was bad you feel every pot hole i had to take off mine
From what I've seen, the Pros ride the same or better. The truck is sprung soft, and the other models get stiff because the shock length is shorter and valving is stiffer. I have the twin to your Pro. And I'm waiting on the westcott kit to arrive.
You say the front suspension receives a 2.5" preload and you aren't certain if the the ride will be adversely affected? It WILL. You say there is too much body-roll. Judging the sheer size of the GINORMOUS front sway bar, I can't imagine there is ANY roll.