Nightfall provides your best chance at an Exotic reward...it has never guaranteed it. Three of coins does not guarantee you an Exotic, it just improves your odds . They dumbed down the way you acquire Exotics by adding them to Quests, thus guaranteeing your precious prize. If you want an Exotic , do the Quests that reward them, if you want a chance at one by running the hardest content outside of a raid, then play Nightfall strikes....Just don't get butthurt or jelly of ur mates when they get one and you don't...It's RNG, it's dumb luck really, you didn't earn anything, you just took a gamble and hope it paid off. Remember....there is always next time!