1. I actually am levelling the job as we speak, and will be using it raids.
2. I don't need to provide any arguments, as others have done that and then some, I would only be repeating others sentiments.
3. I actually really like living dead as is, it could do with some tiny minor tweaks to do with when the heal hits (as stated by others), but thematically and functionally it fits with DRKs toolset, and provides a good mitigation tool that is on par with holmgang, but weaker (and cheaper) than hallowed.
4. Look back at this thread, not a single person has wholeheartedly shared your opinion, I think that says something about what you are saying and you should really evaluate that.