If anyone has some spare time to make this, I don't wanna take up anyone's valuable time really, but since I can't do it I have no choice but to request it:
!laser command in chat for clients connected that are playing as survivors, it allows them to get a laser upgrade only once every map round.
Perhaps add an option/cvar that checks how many maps must have been played before they can make this !laser request in chat, for example after you have played 1 map you get a hint say with "Free laser upgrade available type !laser in chat!"
So that only those that stay to play get this reward instead of rage quitters that play only 1 round.