I just can't see how extra visibility and awareness would be disabled on purpose. Regardless of the feature, what bothered me the most was that when I would open my tailgate my bed lights wouldn't come on like they should.
Did you LED bed lights located at the rear of the bed turn on, or was it just the overhead lights up near the third brake light?
Since this "feature" doesn't cost FCA anything additional, it was likely removed due to too many dealer visits from erroneous behavior. My guess, anyway.