A deeper weapons customization would go along way for state of decay 3 especially if you have a character that specializes in weapons crafting and gunsmithing in real life.
It would be amazing to create makeshift bombs, pipe bombs with alarms/flare attached, trip wire with Grenade attached to it, claymores and More.
Melee weapons that can be customized from Grip , durability, make blades more lethal by sharping the blade , make blunt objects deadlier but placing nails in the bat , spears (can be throwable), and use objects around the world to your advantage if your weapon breaks like trash cans , broken glass , bricks , throw canned foods and more. With guns you can customize the paint by picking up paint cans or spray cans, find a ton of different attachments around the world such as acog scopes, red dot sights, silencers, bayonet Attachment (you can charge enemies) , BRIGHT flash light ,grenade launcher under barrel, gun shields , more slides for weapons to place more attachments and so much more.
Gunsmiths and metal can actually be valuable and think escape from tarkov weapon crafting system.
also guns should have a condition to it so a rusty/dirty gun can jam so you would have to clear the jam to shoot again and a clean gun will perform well.