Should be a flashlight you could attach on the jacket or use a flashlight headgear. Easier to play using gun and flashlight at same time instead of using G17 with flashlight or other weapons with flashlight, which is difficult to find. Make the gameplay bit easier to play in the dark.
If people want not to get murder on the status but want to loot from other players, using tranquilizer gun, dart, rifle could be an idea. Only downside is the range of the weapon. But still is an idea :)
There should be a easier way of jumping over the fence or other obstacles with just one simple move instead of running, stop and jump (frankly a ridiculous way for the character to jump). Have experienced that it's kinda irritate to stop and jump.