Its not immediately clear that Spirit skills are inactive

Currently, inactive Spirit skills look exactly the same as any other regular skills, which are active.

This can lead players to thinking that the Spirit skills they added to the skillgem menu are working, when in fact they are inactive and are doing absolutely nothing.

Solution - inactive Spirit skill gem icon should be greyed out, to differentiate it from active skills.

With a greyed out icon its immediately clear that there is something wrong with the skill.

Well, having more than two icons available at the top of the screen to tell us which auras/spirit skills are active would be a good start in that regard.