I'm experiencing the exact same situation, hence why I'm aghast at the arguments so far. Personally I don't like the mechanic being dumped on the class, but it doesn't do much to slow a healer cleric down so I wouldn't waist my time complaining about it.
You have 3 options for threat reduction, and you want more? The tank not holding aggro may not be a problem on your end if your picking up threat reduction already. Adding more to the over-all class because a handful of players are lame tanking doesn't seem like the correct way to handle the issue.
Why would we need a WoW-Priest-Fade? We have so many ways of reducing our base threat already and your solution is to add more to balance out the self heal nerf? There doesn't even begin to make sense. The self heal nerf is annoying and unnecessary as clerics are already nigh unkillable. But that's the way they play in…