Quote Originally Posted by kiotsukete View Post
Oh, I must be mistaken then. I just play casual content like dungeons, 24 man raids, normal 4 man raids. I thought all the targeting rings on those bosses looked like Directional Disregard and it doesn’t seem like other melee are really doing their positionals.
It's just a new thing added in this patch. It's used by one of the new normal raid bosses when its HP is very low.

Otherwise bosses still have the normal targeting circle or the omnidirectional one for wall bosses or Eureka/PotD mobs.