What a lot of folks often do not realize is that our developers are usually discussing many aspects of game play and player feedback, all the time. There are many situations in which they may later update the functionality of a system based on feedback or game play need and feasibility (i.e. if a system can be updated/adapted easily enough).
Just wanted to pop in an FYI that a recent update was implemented regarding DPS/Tank/Healer variant essences.