The Path of Exile team published the first part of its Patch 3.0 “manifesto” series, talking about the design philosophy and changes that will come to the game with this fall’s expansion. And yes, this initial post has to do with the different types of DoT effects and how some will be buffed, some nerfed, and some both buffed and nerfed.
Another significant 3.0 change (now in testing on a server near you!) are some tweaks to the popular Cyclone skill. The improved skill will use pathfinding to move around obstructions so that you don’t have to stop being the Tazmanian Devil. See it below!
Source: Path of Exile #1, #2