Just a suggestion - but I think Raids could be improved upon by integrating raids from the past into the newer Raids. For example: Vault of Glass should have been delivered at the same time as Garden of Salvation. VoG should have unlocked GoS and having both done should unlock another Vex themed Raid in the future. Maybe even going deeper into the Vault. When the Witch Queen Raid comes out you should release Crota's End first, have that unlock King's Fall, and then completion of both should unlock the Witch Queen Raid. Same could be said for Wrath of the Machine, Scourge of the Past, and Deep Stone Crypt as a re-run to unlock the fourth Fallen Raid - if there is one. Though, I supposed King's Fall could be the first Taken Raid instead, so passing through a derelict Dreadnaught on the way to collect something before doing the Last Wish and collecting more pieces of whatever in order to move into a third Taken Raid would be a nice progression that would allow players to revisit old raids, unlock new content and tie in old Lore, and then prepare fully for the newer Raid. Same goes for when the Leviathan returns with the Lairs and whatever new Raid get's thrown in. It would just be nice to revisit old raids, and have new raids build off the story more by revisiting the old raids to retrieve something or unlock something that makes the old raid relevant and maybe expands the old raid more. Just some thoughts. At least until we get an actual new enemy threat.