I wouldn't really consider this a bug but I think its an important action I think every icon artist needs. And what I'm talking about is the action to chanfe a specific color within the whole icon at the same time liek Color swap but instead of changing each icon states color one by one it changes it all at the same time. Some people called this the Universal Color Swap.

If this option could be pt back in like in 3.5 it would be highly apreaciated. thanks