It'd be a huge boon to WHM since they have the worst free AOE healing by a massive margin. Assize as it stands is a significant damage and mana loss to sit on for the heal portion. Asylum is on a longer cooldown than Sacred Soil and CU and the total potency-over-uptime is worse. Lilybell has a memeworthy long cooldown for how inflexible it is. And to top it all off, it has fewer of them than the other healers. Assize's fatal weakness is that it's an ever-increasing ugly damage loss every second its cooldown isn't ticking. A second charge completely alleviates this, because you can hold an activation while it's cooling down. It makes the notoriously inflexible healer less clunky, feel less terrible to optimize, and more newbie friendly. It's a change that would benefit Sylphie and veteran alike. It's such an easy, elegant solution that the fact the devs thought Divine freaking Benison needed it more shows just how little the job designers know about how healers play.