Yes TBN has still one thing that makes it a bit better and that is the diminishing return formula.

As a shield tbn is always 100 % effective but the problem with that in endwalker is simple. Every other tank has massively improved sustain for both main and off tanking except dark knight, you actually don’t care at all if you survive the tankbuster with 20% or 40% if you can just fully heal yourself as war with a pld off tank in 2 seconds anyway.

So why would you take the job with the most specific magic only cooldown ,the worst immunity in game and no sustain except soul eater when every other tank is just way better and has versatile dmg reduces (dark mind meme)