I don't think "ugly icons" is a good enough reason to change them. There are some I'd like changed, but only because some icons look a lot like others due to color scheme and in the heat of battle I sometimes confuse actions. Specifically, on WHM I often confuse Assize and Asylum icons as well as Raise and Holy icons. Don't necessarily want a complete redesign of the icons, but a color palette swap wouldn't be a bad idea.