Players have been talking about the irrelevance of the old world ever since the Portal launched, and Bungie has a mechanism to make them rewarding and relevant. Instead of Bounties going away, they should be repurposed to encourage us to tackle old world content. "Complete 5 public patrols, get a handful of leveled and tiered gear." Repeat with any old world content you want. Blind Well, Altars of Sorrow, Wellspring, Gambit, whatever. The trick would be making sure the rewards are commensurate with the time sink. It would be a way to make old world content rewarding without having to go through and code rewards for the whole world; yeah we'd get some trash drops in the process, but that's what Dismantle is for. This isn't the perfect solution, but it's better than what we have now, and Bungie already has the code for Bounties/Paths, so it should be easier to implement than trying to create hundreds of new tiered weapons and armors.