I spend a LOT of time creating custom maps in Halo: Reach's Forge Mode. I love the many options and features, and my friends and I enjoy trying out my various creations.
I think the Forge Mode is awesome but not perfect. If I may, I'd like to suggest a new element (or elemental) for the menu option.
No matter what kind of map we create the elements of nature are always constant. That's why I'd like to suggest a new group of FX options for the Gadgets menu.
1.) Seasons - Color for spring, amber leaves for fall, snow for winter, and brighter light for summer.
2.) TOD - Dawn, midday, sunset, night.
3.) Forecast - Fog, blizzard, monsoon, drought, flood, hurricane.
These are just a few ideas my friends and I have been bouncing around for improving custom map designs and options. They may seem subtle, but I think adding the elements of Mother Nature could significantly add an appealing dynamic to map designs and game play.