I used to run Nightfalls for all three characters every week, no exceptions. I USED to get exotics and legendaries frequently. And prior to the new light system, the guns were ready to use or only required minimal effort to upgrade to make them relevant\useful. Now I'm getting ghost, ghost, low-level legendary, 2 motes, etc. I rarely get exotics. Until they revamp Nightfall rewards in a meaningful way, I'm going to avoid playing them unless I've exhausted every other activity for the week.