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Another scheduled improvement coming in patch 1.18a is outlined below.
“[dev1123] Improvements to the Action Bar and Unit Frames
* The following changes are planned for release in 1.18a.
Both are still in development, and therefore subject to change.
Action bar graphics will be enhanced to improve overall visibility. In addition, player and party unit frames will also be adjusted for the same reason.”
Source: The Lodestone
