Halo 4's forge needs:
-A new forge world map that is much bigger in comparison. It should be called forge world for a reason.
-The larger forge world should have multiple sections that in themselves are huge.
-Said sections should have a particular item that only appears in forge where you can control terrain and weather. The sections terrain and weather should gently mix in with bordering sections.
-scenery effects(smoke, fire, blood stains)
-There should be an Item that allows you to insert music or sound into your map.
-There needs to be an area where you can make an underwater map.
-There should be a much higher height limit.
-Excavation tool!
-more vehicles
-more guns and by this i mean a variety of the same type of gun, only the variants have different drawbacks and benefits so that there is no ultimate weapon.
-Maps should at least be able to hold 32 people
-forgable switch activated doors, bridges, and elevators
-terrain that you can edit
-moar budget!
-individual items should have different skins, not different colors.
-Space Bubble!
-a wider variety of gizmos and do dads
-undo button
-delete every item button
-"safe houses" for infection (zombies cant enter and players can't kill while in them).
-physics tool
-teleporters that items and bullets can fly through
-secret areas for the players to find and explore
-enemy ai spawn points
-friendly ai spawn points
-i like that glue idea
-more items
-more natural objects (trees, bushes, etc.)
Overall, it needs even more awesomeness!