Well, it could just be a setting to turn on, that way nobody has to use it.
I'm still fairly new (my main job is only 54), so I don't really know how the endgame plays, but playing a low-level healer with a controller sucks. Most of the time I stick to healing only because changing targets is too much of a hassle. And as a paladin, I barely use "Cover" because until I got the right target selected it is already too late. Having a friendly target preselected (a healer for example) would make this skill much more useful.