Supercell...Wanna make more money?
Archers need arrows, Barbarians need new swords...
Make a Blacksmith shop/Tavern/Black Market...you name it...
You have to arm your archers, right? Sure, go ahead and send them into battle, but if they don't have arrows, they are basically the weakest Giant ever...smacking walls with their fists.
I would add more powerful arrows/swords.
Give them a weapons meter to see the wear on their tools, etc.
It would bring a whole new level of micro-management to the game.
Give barbs shield, Archers flaming or poison arrows...Giants with stronger brass knuckles...Dragons with armor...the additions are ENDLESS...