I often forgot about the Sieve, then I would remember it, check to see if I could play it, and of course it would almost inevitably be on cooldown. Bungie ought to have put a timer or something in the Portal at least, and I do mean [i]at least[/i], at most they could have just not put it on a timer and actually placed it [i]in[/i] the Portal for us to access. (Fine, throw on a "You must own the Edge of Fate expansion pack to access this activity" disclaimer or something.) And the sad thing is I even kind of enjoyed the Sieve when I played it, it wasn't a bad activity! We had a mini-horde mode, escalation, tiered scoring, it almost reminded me of the Season of the Witch activity in some ways. I would have played it way more often if it hadn't been on blamming cooldown all the time. Bungie should iterate on the gameplay mechanics of the Sieve, but move entirely away from the time gating and semi-hidden access. I ended up getting most of my Kepler weapons from the loot cave, which was not nearly as much fun to play as the Sieve. Edit: Unrelated, but Onslaught should have its own tab in the Portal.