Most all newer vehicles are like this... especially noticeable are trucks/suv. I would assume it is to improve handling or aerodynamics.

It is common for lift kits to "level" this out, and often end up raising the front more (in respect to the rear). Start looking at other vehicles, or lifts....you'll begin to notice that the "nose" is lower.



_FYI_ Also if you begin to think....1.5" is not more then 2"...the suspension is different up front, and the control arm leverage responds more to less.

So what is the benefit of swapping out the 2" rear spacers for 1.5" rear spacers to get the truck leveled out?  is it just a preference for the "Look" of the truck?

I would say it would be more for a "look." Some ppl, like me, prefer my ride to have lines that are level and parallel to the ground...maybe I'm obsessive...

Ultimately you are running a lift for bigger tires, which provide the increase in ground clearance.....So if you know what tire you want to run, then you could size your lift accordingly.

Most of your "clearance" issues with tires will be in the front anyways. So the .5" in the rear doesnt play into effect "much."

Swapping in a pair of 4 door springs into the front is a great way to level things out. 

Originally I just ran a 3/4" spacer in front and a 1" spacer in the rear, I had Jeff make them up for me.  Just enough space to clear the 235 tires.  When flexing out I would rub on the top of the fenders due to running wheel spacers and off-set rims.

On Project Trouble we are running 30x9.5" MTR radials on stock rims, with the front bumper trimmed  and 4 door front springs they fit without issues.