Like the option for you not to respawn if your infected like for customs like that like the Halo 3 infection map Halo where your getting sniped at while on mongooses then when you get killed you don't respawn that option is missing
There's a LOT of options missing from every game mode, some really basic stuff to. Honestly I wouldn't expect them to be adding any more options.
Still waiting for 343 to find some sort of way to actually make a gametype with the option to set 'random weapon' starts in the settings without having the need to make a completely separate Fiesta variant........................................................
We really needed a trait zone to work as a trigger for scripting and they didn't include that either. It would be nice to have an option that when a player enters an area to turn on or off items or spawns... It would be cool to make level progression infection maps, but the infected need to spawn in the area the spartan's go to.