NEw ideas for Halo 4's Forge

What new things would you like to see in forge mode. Bungie definitely went in the right direction with the forge mode in reach. They added a lot of cool stuff but I still think that 343 can do better.

First of all, forge should have more variety of objects. This helps to keep the maps different and unique.
Second, I would like to see the ability to change the terrain and the weather. For example, it would be cool if you could add rain or snow to the maps. Also, it would be nice to change the ground type. For example, you could change standard grass to sand, rock, concrete, water, or possibly no ground (make the map in space…who knows?)
Third, I saw this in another post a while back, but adding the dead bodies of characters like marines, Spartans, and elites.
Fourth, more vehicles and weapons, but that comes with the rest of the game.
Fifth, different forms of powerups and explosives. Maybe a powerup that would increase your speed or new explosives instead of the standard fusion coils.
Sixth, more forms of lighting effects.

Any ideas…?

you should be able to select multiple forge objects and save them as a structure or something and use them later.

the ability to change the skins of objects, for example change a gray 2x2 object to a overgrown 2x2 object ect…

also the option to change a maps skin lets take forge world for example. lets say you want to change it to a desert map the water would disappear grass would change into sand trees would change into cacti or gnarled old trees rocks would change to match the new environment. this setting would have temperate setting desert, jungle/swamp tundra, flood, possibly some more but those would be the main ones.