Add throwing knives, hatchets, or some other similar utility.

The repair tool is very fun to use as a melee weapon, and I think there's potential for some other weapons in that high risk / low reward category, like melee weapons or one-time throwables.

They can be under-powered (getting into melee / throwing range is hard enough) because the goal is to re-create the excitement that an unexpected high-skill play generated in all the classic shooters (think of how hype people got for MW2 throwing knife kill cams)