Warrior doesn't even need a healer in most dungeons rn. Giving it an effectively 100% uptime on ToB, thus +20% healing bonus, is way too powerful, if not (heal-)overkill.

I am saying that as a WAR main: WAR is already overpowered (no pun intended) it doesn't need any more cooldown/duration buffs in that direction. Warrior also has the Vengeance recoil bonus, it doesn't need anything more.

Mind you, ToB was once on 120s CD. The recast reduction in Shadowbringers is already a buff. The reduced duration is a non-issue because you use it for its healing effect, rather the HP increase / don't have any use for its HP increase longer than 10s.