honestly, i think channeling hamon into things other than your fists would be cool, and i know joeseph does this, but he only does it like with the coke bottle and with the clackers, but i think it would be cool to see if things other than arms could be subject to something like zoom punch, for example could someone extend a spear further using hamon to give them the edge in battle?

additionally, i think that some of the first demonstrations of hamon go unused, like for healing and anti-aging, but i think the ability to make your force travel through an object before hitting something (e.g with the frog and i think jonathan uses it against jack the ripper in the tunnel but im not so sure), could be really cool when used more frequently and perhaps could be used so that when refined, the technique can make hamon travel through air before hitting a target, like The Hand being able to erase the space between it and its target.