I don't know if I am being nostalgic but I would love to see the elemental workshop questline being completed because there are still 5 runes to go through in the series, nature, law, death, blood, and soul.
Maybe some of the rewards could be a hybrid weapon set where the weapon can do both physical and magic damage with it being pared as a range or melee weapon. That could really fill out some of the combat tree as well and make things more random when in pvp or pvm.
I guess what might be important would be re-defining the existing elemental armours first. They're currently just a fairly poor magic-class tank armour. If they were to be changed to an interesting, unique and viable kind of armour, players also might be more open for a continuation of the quest line.Improvements: Tooltip / (F2P) QoL v2 Quick Fixes: Invention