1) Repair all.
2) Have all aoe skills not require a target selected to use. How hard is it to just have the skill activate in the direction my character is facing? Like, god, this so utterly standard in many other mmos.
3) Be able to put all artifact weapons and gear in the armoire.
4) Auto sort toggle for all inventory categories (again, something so god damn standard in so many mmos).

Having all these features would change my life in this game.