i think doors that you could open and close would be cool and also windows that have breakable glass. and new vehicles that you can drive and older ones like for example the truck on foundry. Weapon racks or shelves. Chairs, desks, i think they should add phones and computers to more of the maps. like tv screens or monitors. thats all i can think of right now
Not nessacerily. The actual objects can be in an XBL update. However to unlock them in forge you have to pay for it.
Then you would need the H3EK. Even if we get it, it won't be like the HEK, but like the H2EK, locked up. You couldn't really mod anything.