So for WotLK Blizzard decided CoH should be a smart heal instead of party specific. Why? I have no idea. I don't remember any priest really asking for this and its obvious the spell would be OP in that form and that's exactly what happened.
Now blizzard realizes it's a problem of their own making and to fix this problem, instead of putting the spell back the way it was, they decided to keep it a smart heal and put a 6 second CD on the spell. I'm not really happy about this. In my opinion using a smart heal is just boring. At least when it was party specific there was some slight skill and strategy involved in deciding which party needed to be healed the most and which could wait. Instead its now a face roll heal with a giant CD (compared to it's previous instant cast).
CoH wasn't broken in TBC. Blizzard broke it for no reason in WotLK and their solution is to nerf it by 400%? Lame. Agree or disagree.