It would be nice to see the ability to craft sand bags and place them for what ever reason.
step 1 : find burlap sack
step 2 : find shovel (for digging the sand)
step 3 : go to beach and use shovel to dig sand (maybe you could have a model of a sand pile).
step 4 : drag and drop sand into the burlap sack.
step 5 : place sand bag were desired.
This could be used for creating firing positions for snipers, protecting camp sites and many more possibilities.
In the future when base building is implemented this could be an immersive way to use the crafting system.
Maybe not just use sand ? how about mud from the forest floor?