In DD, I was using the pyramid mainly to transfer my loot in a few boxes close to a merchant. Will the Battlefield always be accessible ? If yes, I could teleport there every time I need to unload my two mules. Until the games gets a few patches about money that is.
The battlefield is always available, and can be used to hold any number of objects. However, it's destroyed and re-genned when you switch acts, so be sure to grab everything you've left in a battlefield before that occurs.