After introducing a friend of mine to AO, a point came across that it would be more convenient if you could know if an NPC had a quest at higher levels in case you level up and want to come back.
A simple way to fix this issue is adding a transparent grey question mark like the normal quest signs that has the quest level on top of it above the NPC’s head.
From full release onwards, most static NPCs will have a quest, this’d just create visual clutter.
An alternative could be a modified text that hints at a quest
Overall good concept since the patch note said “All stationary NPCs in towns that do not have dialog or quests have been removed”
Since you’d still have NPCs that would be virtually indistinguishable from a quest giver(later on) or not