Built in healer interface.

[Acesfool]

I guess the answer as to why more MMOs don't have an interface like that is that it's pretty exclusively useful to healing roles only, and the general UI needs to be designed for everybody to use. Most MMOs are incredibly lacking in the UI customization department; WoW's only saving grace there is the addon support.

You make a valid point but I was thinking more along the lines of an optional interface that you could enable for healing.