More unstandard melee weapons, in the form of bayonets, shovels, grandmothers cast iron pan, could open the way to something more wacky for modders (Everon Golden Age of Piracy) or potential April fools side project.

This feature could also aid with when switching between weapons or items. Currently switching to your sidearm feels rather slow. While dual-wielding, with one hand full of M16 and other hand on M9 would be ideal, why not pull out a real knife or nicked speznas ballistic knife.