I don't have an issue with the icon itself, my problem is the fact it is the center of attention. It's a giant Red blob, and it is an eyesore. They need to make it look better, and not be so damn ugly. The option to toggle it would also be nice for those that don't like it.

And the people that attack Non-Aggro when it is obvious there is aggro nearby that will infact aggro you when you fight near it, need to go play a different game. Or die.