I'd like to see the color of the green targeting display changed when you're queuing a skill, to give an indication that the skill's not quite ready to be cast.
The actual color could just be a desaturated green, or that dark reddish color that you get when you try to target an unanchored cone that is obstructed.
This would also be a nice visual indicator that explains that skill queuing isn't a bug, but is in fact an intended feature!
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