PBAE illusions that will hit anyone nearby in group/raid. I'm mostly thinking of functional uses, where, say, you want part of the group/raid in one place, and others in another, you could quickly drop a couple PBAE illusions to make the visuals easy.
Grow/Shrink beyond normal limits.
Since we have evac potions now, maybe a self evac clicky.
Ability to redo the face/hair option for your character?
Perma Item Illusions? Something like you equip whatever items you like the graphics of best, use a /cmd or something, and it locks the graphics even when you switch back to normal gear? That may be impossible or undesirable, since its kind of cool being able to identify what gear people have by looks.
You could have a 1 hour, 10s cast rez clicker on the idea that it just saves the tedium of rez urns, but that one is definitely adding a bit of power.