I think what they could do for the INT tree is add the crossbow to it as crossbows are actually more complicated than bows when crafting ( especially the tension driven trigger system ) and then adding a taser or just a normal button as a low tier melee weapon
Well a giant manned ballista that...
Maybe somewhere in the living off the land skill tree make it able to make nests / chicken coops to have a passive way of getting eggs. there can also be a pigsty where you can farm with some pigs.
to make it more realistic :
… You will need to give the animals that you have some food . to...