I have some suggestions
Make ragdoll physics improved
Save and load feature(i keep loosing progress every time i die or qiut the game)
If you have some free time,make the following weapons
Ak47,74u,74m,12
Some attachments
M4a1(carbine)
M16
Mp5
Sawn off shot gungun
Now some utilities
Flashlight(can also be used as attachments)
Matches and pieces of wood
And a starting weapon"knife"
Thats all but i have alot of ideas
Cuz i felt but that you might be tired of working