The thing is that, given what I have read, it seems to me extremely unlikely that Jesus would ever have wanted that anyone consider him a king.  The gospels have Jesus talking about us all being children of the same father; they have Him consorting with all sorts of people -- including all those whom society cast out -- the lepers, prostitutes, tax collectors; they have Him washing the feet of His disciples.  This is not the sort of man who would want to be elevated to kingship.
I understand why this symbolism existed in the past (both for good and not quite so good reasons).  But why can we not go about dropping it by now?