Cool work! :D I don't think there needs to be any improvement since it is good enough for any project (of course, everything is good enough for me, xD, so I am not good at giving critical feedback). So I guess you can add more weapons? There already seems to be a lot, including staffs which are cool. I can also recolor them as I wish so these weapons are good for a future project I have in mind.
So maybe you can add claws? Claws are animals' weapons. :) And maybe a regular wooden stick/pole (if someone has a crafting system in their project? It can be useful). Perhaps a branch (I guess some nature people can fight with branches)? Angelic & demonic sword/dagger/stave etc. :) Vampire fangs? :D (Okay, I am probably straying away from the traditional weapons, lol!)