(Image credit: Bungie) As much as I love Marathon , its progression hits like a brick wall after a few dozen hours. Quests become longer multi-step treks across maps around the same time high-tier upgrades start asking for dozens of items that I've encountered maybe four times. These are issues that Bungie is seemingly testing against in an "end of season' update coming on May 19. The big highlight? Locked room keys—an extremely rare drop that grants access to the best loot rooms on Tau Ceti—are becoming guaranteed drops for on-map events. And hey, Bungie's taking the orange cones off the entrance to Cryo Archive. The raid map will be open 24/7 for the remainder of season 1. At the same time, Ranked Cryo Archive is also coming—that playlist will have a low stakes 3,000 credit buy-in and a high stakes 10,000 credit buy-in. Faction experience gains are increased "across the board" for the rest of season 1 Key templates will no longer break if you're downed.…