But nearly everything has been found 'ritually deposited' somewhere and what hasn't been found either will be one day or won't be because it's bio-degradable. The finest brooches and the crappiest brooches. People. Shells. Swords, shields, beads. All sorts. A lot of heavy weapons deposits could be actually where a defeated army's weapons were destroyed and disposed of as a power and control statement more than in any ritual. I know it's unlikely, but it is possible with some of them.
Some axes are definitely ornamental, but these probably date to a time when axes were becoming obsolete, just as ornamental swords tend to date to times when swords were on the way out as a weapon.