4pc tier 15 will allow AA to proc off of non-crit heals as well. So, every heal you throw currently, despite the amount of crit you have, that has a chance to proc AA on a crit, will now also have a chance to proc AA on non-crits. Is that freaking awesome?
Crit can't be devalued. Crit is RNG and that makes it wonky at times, but the 4pc buffs AA through non-crits.
Crit makes you heal for more, returns mana through resurgence and procs a smart heal:it is valuable to a high degree. The 4 piece simply allows one of your smart heals to proc on any heal related to AA.
Someone please explain to me what I am missing here.