I would really love to see the difficulty adjustments become optional. Some of us progress slower just because we have other obligations. It feels so sad to be deprived of the difficult content just because we don't consume content as quickly.
Maybe adopt the WOW model of a "+x% to damage dealt, +y% to healing done, -z% to damage received" buff that can be deactivated in stages? And activate the buff by default. When people turn it off, they get extra loot for each stack of buff turned off.
E.g.
- 20% buff - max buff, people get the same quantity of loot as before the buff
- 10% buff - turn off 1 stack, people get 1 extra piece of loot at final boss
- 0% buff - turn off all stack, people get 1 extra piece of loot per boss
I often hear that the point of easing off on old content is so people can catch up quickly and/or people can get past it after being stuck. In that case, this system allows those who got stuck to get past it, while at the same time letting those who have the skills but not the time to catch up quickly yet not feel like they're being handed boring wins just because they can't invest more time in the game each week.
People who's actively doing new content could also come back and have better chance of farming for that one piece they really want.