Black desert Skills have a skill cooldown information displayed on the skill window, as well as on cooldown UI. Unfortunatly, developers have merge this two different type of cooldown on a single display, resulting in misleading information that often suggest that the skill will not be usable during cooldown, even when that is not true on many skills. By separating skill activation cooldown from the skill effect cooldown, one could identify when a skill can be used, and when the activation cooldown defers from the skill effect cooldown.
For the UI, the skill under multiple cooldowns could be display simultaneously, differentiating which one of the cooldown is active.