Something I have been thinking for some time.
In almost any fantasy story you have amulets that are either intrinsic to the story or at least have useful facilities like Amulet of Strength, Amulet of Purity etc. Even if they are named to a person, often they have an important role to play in the plot.
What I suggest is, making amulets with some functionality. Not a straight up open slot, but a boon function.
This could give a tiny boon to classes that lack them, but not as significant as actual signets/utility boons.