I have only recently started tanking, and thanks to Losie's excellent trhread I am on the way to uncrishable, so I haven't done a raid or heroic yet, but soon hopefully :)
I don't have a threat metre, no one in my usual band of instance runners does. There is a view (some hold it more than others) that all these add ons detract from the game. I do have sosmos, but most of the add ons turned off, I like the co-ords and a few other small things.
Reading a little about the upcoming changes such as hand of salvation, it looks almost like a threat metre is mandatory to being a paladin tank now. Are Bliz forcing us down this route? Should they not build in some of this functionality into the game?
I hope I make sense and I'm not just jabbering on...
thanks.