The new level scaling system released in patch 7.3.5 has been controversial. While it does provide a more immersive experience, leveling takes a lot longer now. Some legacy raids became impossible to solo. More importantly, though, is all the unintentional effects that the changes had.
Transmog hunters were particularly affected by the change that made all dungeon and raid loot only drop via personal loot. While this was ostensibly done to streamline the leveling experience and make all random dungeons and raid follow the same loot rules, instead of every raid boss dropping say, four items, you are lucky to get one. This makes farming transmog gear much more painful.
As a result, Blizzard announced today that "trivial" dungeons and raids (that is, instances that are intended for players at least 10 levels lower than your level) will operate under a new loot system called "legacy loot mode."
From the blue post:
Since the Patch 7.3.5 change to use personal loot rules in leveling dungeons, we’ve heard a lot of feedback from Transmog hunters concerned about how this has affected the ability to collect appearances from older content. We hear you, and agree it’s a problem, so we’ve been working on a more robust solution for Battle for Azeroth.
Once these updates are implemented, entering a dungeon or raid that is trivial for you (i.e.: your character is 10 or more levels higher than the dungeon or raid’s intended level) will activate a “legacy loot mode.” That loot mode will work like this:
The number of items dropped by bosses will be the same as it would have been if you were in a full party. So if you’re in a 5-player dungeon, you’ll get 5 players’ worth of loot.
All items on the loot table will have a chance to drop, not just the ones that are designated for your spec.
If you have multiple players in the group, the loot will be split among those players, but be tradeable. For example, if you’re clearing with one other player and kill a boss that should drop 4 items, you’ll each be able to pick up two items and trade them between each other if you like.
While the personal loot change was a key part of what allowed us to expand leveling dungeons to encompass a wider range of levels, and we’re happy with it in that environment, we recognize that it’s not a great experience for those who enjoy clearing older content for transmog, and hope that these changes will make that more enjoyable once they’re complete.
Thanks again for all of the feedback!