The "double nade" its sometimes annoying, but the players dont know what gas mask do, you have jumps to buy, gravity, bat, jetpack if you find it, the way it shows you in the chat that "nick has bought an infection grenade (1-10)" helps you a lot, of course there are players complaining about it, they dont like to be zombies or they complain about it because they had jetpack, they bought golden mp5 and no recoil, armor and this combination is 100+ ammo packs so they get annoyed by this, but where is the fun when you are a human everytime? In my opinion, the nades dont need a cooldown because there wouldnt be fun or multiple infections to be harder and earn more ammo packs, players need to be strategic in order to remain a human for the rest of the round and to complete the mission.