Living Dead is often an unfun and frustrating cooldown for both tanks and healers

[Yeol]

Additional Effect under Walking Dead Status: increase HP recovery via healing actions on self by 200%, ensuring Critical Healing effect".

While I agree that a small change is needed, but this is a bit too much.

I'd say increase HP recovery via healing by 20%*.
No guarantee crit heals because this will affect shields.

Also another thing to note. DRK has 10s of Walking Dead, but most healers start spamming heals at the last 4s.
This can work with other tanks, but not DRK.

1st heal: 10~8s
2nd heal: 7~5s
3rd heal: 4~2s
4th heal: Benediction or emergency oGCD.

Trying to spam heals in the last 4s is a no-no with DRK. Unless you have big oGCDs and/or cooperating with your co-healer.