Warrior & Pacification

[Bixby]

1. Berserk. 5 seconds of pacification after the 20 seconds of it are finished. Although some mobs can cause it, too.
2. Be more careful about using Berserk.
3. Because it's 5 seconds. By the time a healer finishes whatever spell they're already casting, it's even less. And then the cast time of Esuna itself cuts even more time off of it. By the time Esuna actually lands, you're saving maybe a single GCD of pacification, and locking yourself out of heals or other spells for another GCD.

Edit: Also, there's a certain level of trust involved re: Esuna. When I'm healing, I trust Warrior tanks to not use Berserk at foolish times. You shouldn't ever put yourself in a situation where the healer needs to remove pacification (e.g., leaving yourself pacified right before Mountain Buster). So I tend to assume when the pacification icon pops up that it's probably not a big deal; I'll Esuna if I don't have bigger fish to fry.