BoA rep.(perhaps w/ shared daily grind for fairness? not sure about that part)
BoA obnoxiously long unlocks such as essences or back in the day attunments, etc.
account-wide, maybe bottomless, reagent bag.
This is not exactly QoL in the strictest way it tends to be used, but game design that counts on fun keeping people playing, as opposed to the one million artificial tricks used this expansion. Particularly no do content X to have acces to content Y in order to be able to acces the completely unrelated content F
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ohhh, also absolutely this.