Bungie, why reward grinding low tier content like strikes, heroic adventures, missions, etc but not your best, most fun content? Make old raids relevant by letting them award powerful drops per encounter. You can even soft cap the normal drops at 520 like the world milestones (+5 up to 520, +1 after), and soft cap the prestige drops at 540. The time investment per encounter would be in line with your other weeklies, given the difficulty.