Zombie supplies.
I've never seen this feature on zm servers, but i guess it will improve gameplay.
So, how does it work:
Its red supplies(same model as human supplies, just red). It will have rarer spawnrate(x3-x5 compared to human supplies).
And it will include next things as drop:
1. Zombie madness - 30 secs - 20%
2. Invisibility - 30 secs - 18%
3. Sharks(or whatever their name, kinda forgot it) - same amount as from shop - 9%
4. 10k hps - 28%
5. 20k hps - 13%
6. 30k hps - 7%
7. boss - 2%
8. double gravity - 30 secs - 2%
9. triple gravity - 30 secs - 2%
10. zombie madness - 1 min - 3%
11. Invisibility - 1 min - 4%
12. Infection grenade - 1%
So, why does it good suggestion? We can increase/decrease spawnrate and chances of drop, and also drop list can be changed easily, so in opinion it wont be hard to balance it. Ye, ofc, it will take some time before we find the best drop pool and best items for supply drop. Ofc we can restrict zombie supplies when server has less than 14 players for example or something like that