At the very least split the effect so that Walking Dead's damage immunity doesn't end on being healed. I am so tired of being killed by healers who are just trying to do their job. I would also suggest if it does not proc (as in, you used it but were saved by the healers and Walking Dead does not proc) that the cooldown could have a partial refund since you got nothing out of it. It won't change anything for planned usages but any time I have to use a panic Living Dead and it doesn't proc because I suddenly get a bunch of heals it feels really bad. Holmgang can also not grant it's bonus but the cooldown is much lower than Living Dead's and since Holmgang is flatly superior at this point that doesn't make a whole lot of sense.