Maybe some idiot at bungie made a requirement that you have to be 550 level just to entertain this nonsense . I finally got to the dreaming city but still stuck at 509 level because of this bull shit level progression we have at the moment maybe that might explain why no one is there
People claim that the old crucible trick from D1 works in this game too. And what I mean by that is walk towards the blind well. When you get to the first set of stairs start walking very slowly. As you slowly walk to the well apparently the matchmaking kicks in and gives a longer time for it to cycle through and find the one with the most people. Thus once you arrive, there will always be people there.
I can usually find 3-4 others at the well when I'm doing the bounty.
I sparrow in half way then walk the rest and usually find an instance with other players. If no one's there I wait & get players show up pretty quick or I leave and come back to a new instance with players.