TBN & WD probably wont be fundamentally changed (in 6.xx)

[HyoMinPark]

And if they let shields contribute to the 100% (and they leave it at 100% which imo is too much) then drk can cover a quarter of that and sch/sge can more effectively as well. Shoot a single galvanize crit could wipe it out

This would be suboptimal healing. At an optimized level, neither a SCH or SGE are touching their GCD shields. So in these settings, DRK still wouldn’t be using LD because it would cost the healers. Why would the healers opt for LD, blowing more resources than necessary, AND GCD shielding, when they can just have the WAR Holmgang? Or the GNB Superbolide? They are still spending significantly less resources on both of those. Even in a non-optimized or casual setting, this is the case.

While SCH can force a Crit Adlo with Recitation, SGE does not have an equivalent to that—and one crit shield is not going to cover the majority of a tank’s HP. So again, we are now forcing healers to spend more resources to heal Living Dead where they use significantly less on any other tank immunity (or none at all with Hallowed Ground).

I don’t think you understand the issue of LD versus the other immunities. Especially not in terms of the healing requirements and how much of a resource drain LD is compared to the other three for any healer that isn’t a WHM.