I would welcome the option to turn it off, simply because personally I don't need it and find it ugly. I can see how others would find it useful though. For the argument of 'be prepared to explain to newbs if they get rid of it' ...before they had it, did you find yourself constantly explaining to newbies what agros? I've been playing since launch and I can't say I have once had a newbie ask me what agros. They run into something, die, laugh and carry on with the game. If someone quits over something like that then that's fine, they're clearly way too stressed of a person!