I just spent 6 hours+ doing the Lightfall Legendary campaign to get swarmers for a strand build, but when I went to Nimbus, his normal menu popped up, with no exotics to choose from. I've redone the first mission, still nothing. I haven't done the Legendary campaign on my Warlock before, so I should be able to get the loot. I have Cyrtarachne's Facade on my Hunter, which I got before the Final Shape DLC released, so maybe this is due to something with the DLC?