I have no idea why anyone wants MP management back with the way healer kits currently work. I've said this in several other threads, but I'll repeat: MP management is only interesting if it creates choice. You choose between being efficient but weak, or powerful but resource-intensive, or some sliding scale between the two. What would you do in FFXIV if your spells cost so much mana that your recovery tools couldn't keep up? I can tell you, because that was WHM in Heavensward. Just casting Stone 3 would eventually bleed you dry. What could the player do in this circumstance to mitigate this mana bleed? Well there was one solution: just stop casting. And sit. Like in Everquest. There *is* no more MP efficient Glare. There isn't a more economical Dia. As it stands now, advocating for MP attrition is advocating for jumping in circles between heal casts to get your mana back.

I can't imagine how simply adding hefty MP costs on basic abilities would make encounters in this game more interesting with the embarrassing dearth of choice the kits have.