since its a gore sandbox, some misc weapons and more crazy melee weapons would be fun and interesting to use, like a sword or harpoon gun, just seems fitting for what is a basically a gore sandbox, also a riot shield would be cool due to how hard it is not to trade damage and would open up and would open up a more fast paced style due the whole trading damage thing, one last thing to add is that it would also be fitting if you could change your masks, the theme seems to be that the guy were playing as is a crazy murderer so having mask customization would be fitting with the serial killer cliche.