I certainly agree with the idea that living dead could use a little more love. First, I think it would be nice to have a visual effect of some sort when walking dead kicks in. Second, perhaps have the debuff itself state how much HP still needs to be healed to take it off.
I was also thinking, in some future point, of one possible new ability for Dark Knights come the next expansion that could also help out. Perhaps an ability to "eat" one debuff which can possibly even restore MP and/or HP, but one great point of this would be its ability to also get rid of the walking dead debuff.