Auto Reload All traps after village has been attacked
I think after a village is attacked the traps should be auto reloaded as long as the user has the appropriate resources available in their storage units.
Once a village has been attacked a future attacker can pick this fact up by the fact that tombstones are left signaling to the new attacker that the suspect village has already been attacked and his/her traps are exhausted. This is a weakness of the game as folks can not be online all of the time they can be attacked 3-4 times over a 7 hr period (aka sleep).
I would say take the tombstones out of the potential attackers view and/or think about auto-reloading the traps with exlir and gold from the users storage units (which would encourage users keeping storage, this in turn would result in higher loot options for attackers and will result in more attacks).
I also play boom beach I like the vault concept that could be carried over just for trap reloading. You could limit the vault size to encourage players to log on each day by not allowing the vault to be too large. Just large enough to reload once or twice while the players get some rest.