One of the problems I've come up against is the Macros Icon not behaving like a regular Skill Icon.
i.e.
/ac "Thunder II" <closest aggroing enemy or whatever>
The above command works near identically to thunder II, and I might assign it the Icon for Thunder II. There is no way to get the Icon to behave like the Thunder II Icon thoughL It doesn't display cool down, or when thundercloud is available.
Could Game dev create an option where you can assign an 'actual' skill icon or elements of a Skill's icon (combo display and cooldown) to a macros icons?