When we initially mentioned the major Area of Effect changes coming in Content Update 2.6.0, some players asked why we were buffing AoE skills further. While most players understood correctly, we wanted to post a detailed description of the changes so that all players understand the purpose of the changes.
Extreme min-max AoE builds are nerfed by these changes. Builds that didn't go all-in on AoE are generally helped somewhat. In addition, less-frequently-used skills with lower AoE have been improved. This is an intentional rebalance with the specific goal of providing more decision variety and reducing the absolutely-mandatory feeling of AoE for certain builds. It now acts like other game systems, rather than growing exponentially at the end-game.
What are these changes?
All sources of "Increased Radius of Area Skills" have been replaced with an increase to area. This means that rather than the area of the skill increasing geometrically as the player invests in the modifier to area scale, the radius gained per point of the stat will be lower and lower as heavy investment occurs, similar to diminishing returns. The goal of this change is to make investing in the size of your area skills to be less rewarding the more you invest, so players don't feel like they need to gather every single point of area radius to reach their character's full potential.