After looking through water Fall the bottom of the map is a large landscape with paths to more areas
Currently the map has a kill barrier that doesn’t let you go down there but this area would be Great for Forging below and it’s big enough to be a canvas and is practically in a Crater
For 343 to do this they should do what bungie did with Sandbox: add a teleporter that takes you below, passing the kill barrier to Forge as we please
they would have to add new kill barriers below from leaving the Crater but 343 is still working on maps for Matchmaking there is time