The ability to specify a default skin for certain items. There is another plugin that apparently does this but it hardly works for most items.

default skin like what, for crafting or first slot in /skin or?

For whenever the item is found/looted/crafted. So you set a default skin for a hammer, when the player creates a hammer it has the skin you've defined by default. Then they can change it.

that should be a separate plugin imho