[Mithalwen]

I think also they would think that they are best out of reach even with Feanor and his son's dead or as good as. The one that they do get under their control they set in the sky. What would they do with the others that would have the same symbolism? Three Silmaril stars reduces rather than increases the impact.

I think there is a lot of symbolism - The Silmarils are the antitype of the Three Elven rings. The Silmarils are the product of the greatest craftsmen, are withheld from the common good, are seized by the evil being that desires them and the result is much destruction and suffering. They are in essence trapped fire and finish up distributed among the other three elements - earth, water and air.

The three rings in origin come from the earth and represent and have particular influence over each of the three other elements. By bestowing them on peopel who wil use them forthe common good they are saved from the evil power who desires them and help to preserve the realm of Lorien, the refuge of Imladris and aid Gandalf in his work.