It might be...

Vanguard has seen some significant changes since launch. Chief among them might be the removal of the Equipment Expertise system. Today Ralsu revises the guide to adventuring stats so that you can stay informed.

Equipment Expertise (EE): An old mechanic no longer in the game. This statistic used to control the amount of gear a player could equip before becoming encumbered.

Take a look at Ten Ton Hammer's VG site.