In large team games there are times you want to share metal to another player - perhaps they are rushing an Anti etc.
Currently you can only share metal you have stored up. It would be cool to be able to allocate some of your metal income to another player - i.e. drop 5 metal/s and give them 5 metal/s,
There are times you have many things being built using your metal as fast as you gain it so you are unable to save up some metal in storage to share. Selecting everything and putting low priority does not solve this, at times you may have a large unit (crab, jug etc 80% done and cancelling it to free up metal is more detrimental.
Essentially a way to pause/turn off all metal use to allow you to save it to share or an ability to share income of metal.