I mean, not only is it then becoming another classes actual class skill (Monk > Mantra)

But is it even necessary?

Are healers not already healing enough?

Are they struggling with AoE healing because for some reason Critlo > Deployment Tactics no longer works?

Do they no longer have Largesse that they can actually time for when they want it active?

That's my thoughts. Like, sure, it could become party wide, but it's not particularly necessary. Heck, even as self only it's not particularly necessary...

I'd rather it be replaced by an effect that actually has an impact as a Tank player. Like damage reduction, a self heal, maybe like a weird version of Bloodbath that heals a portion of the damage you take (AKA Quasi-Damage Reduction) or maybe get healed for a portion of the damage the party deals (Including yourself)

Since, it honestly, is probably the least useful CD available to tanks, given how much healers already heal for as well as their own CD's they can use to boost their healing.