Neat ideas!
I was thinking that they would like to add some items to the game. Say, a nuke launcher (though heavily watered down to not become way too op) or an item machine gun that can fire any item. Or even low level stuff like staves or 9mm smgs.
Perhaps new components and armors? Or a mech suit that you could build and that has a chaingun and a dual rocket launcher?
Anyways, they could also extend the map and add some stuff to it. Like a completely new area a la Ashes of Phoenix or a new dungeon related to the final remnants of the master's army and some vats that survived the vault blow up.
What do you think about these ideas?