World of Warcraft's patch 11.1, which is currently available on the public test realm and will shortly be rolled-out to all players, looks like it's fixed one of the game's most enduring issues: swirlies.
These are ground markers that telegraph incoming damage to players, such as an AoE boss attack, and basically they've always been a bit of a pain to make out when amidst the cavalcade of other effects the game's typically throwing up during such encounters.
There are a number of UI mods to counteract the issue but Blizzard's decided to fix the problem at source, with the new patch giving swirlies a much clearer and more defined outline.
The difference between old and new is immediately obvious, which is a tremendously good thing given that the whole point of these things is to tell you where not to stand if you want to live.
Blizzard describes the changes thus (via WoWHead): The new swirlies can be seen in action in this clip from a player on the PTR.