The three reasons I refuse to make a custom map!

For the basic vanilla maps and modes, such as Conquest on Siege of Cairo example, there should already been codes for these experiences created by the developers without people starting from scratch, in other games these could be used as templates to start with, if these codes exist where is the list. Currently searching the experiences is a mess, after the patch to Portal removing Back Fill bots has left a lot custom experiences that no longer function that you have to sift through.