I experimented with other weapon packs, but none have the right feel and have other problems (like the fact that they don't hit instantly, allowing for you to 'dodge' bullets). I think the reason a lot of people dislike Complex Weapons is because magazines are stored in the inventory--but that was the entire point of the scavenging aspect. You can carry a limited amount of supplies. Another one is that they are tricky to use and take a few seconds of solid concentration to reload--allowing you to slip up majorly in combat--which some players find frustrating. Personally I find it creates really incredible tension when plays have to start manually reloading weapons mid-firefight.
I think I'm gonna add a melee system so someone who runs out of ammo mid-combat isn't necessarily doomed.