The Raw Intuition is probably one suggestion I don't really agree with. Mostly because we are talking about DRK getting the buffs really. I get WAR is the most absurd with Raw Intuition upgrading to Bloodwhetting, but PLD and GNB actually do pretty good on self sustain compared to their damage contributions. Those 2 don't really need a generalized Raw Intuition last I know of.
TBN admittedly doesn't bump much heads with 3 of the 4 healers. It's mostly with WHMs it has issues with since the Holy stuns translate to the shield not getting broken for Dark Arts. TBN also has a somewhat negative scaling issue with higher ilvl for Savage raiders possibly not being able to break the shield on 4 man expert roulette runs. Even though this may make the ability easier, one possibility is to extend the 7s buff timer a little longer to maybe 10s. Another avenue could be reducing the threshold of the shield breaking to being around 1/2 to 3/4 of the shield used to proc Dark Arts.
Living Dead is pretty powerful when you get to use the self-heals, but you gotta admit that the ability goes against what all 4 healers normally try to do. Even with WHM having a lot of instant cast heals, it still involves using some of them around 30 - 80% of the tank's health rather than 1HP. If Living Dead doesn't proc the "dying" effect, it ends up being a wasted longer cooldown Holmgang so to speak. This is why a heal shutdown effect with a 20 - 50% consolation "excog" heal from "not dying" is suggested.
As for the healer issue, I am mostly suggesting maybe a couple more buttons for the damage fillers to reduce the Glare spam a bit. Not remove it entirely, but reduce. Since over gearing the content will always result in less healing and more DPS uptime. Some of the other healers recommended something akin to a 15 - 30s cooldown. It would require consolidating some buttons together to make space like Cure 1 with Cure 2 as an example.
I haven't really tanked the 90 - 100 dungeons though, so I don't know how prevalent the healing issue is compared to what Anjou says. My Savage DRK friend raider confirms that it does happen sometimes. I was a bit confused that I was regarded as outside the norm a bit for still using healing cooldowns.