I'm going to try my hand at making a race track this time around. The interlocking and floating business was too much of a pain for me in Halo 3, and Reach is already letting me do it properly with little effort. Not to mention, Race is an actual mode again. If there's a way to make Battle Tracks work again, I will certainly be adding weapon pickups to my track.
I've never been good at making levels, though. My first race track will be likely be a completely amateur deal. Good thing I'm not limited to 100 map and game variants this time around.
Which reminds me. I need to make another "Life" level, as I tend to do in games with level editors. This time around, everyone will be stuck in a small room with no real weapons to choose from, and then Killballs will spawn after half a minute, killing everyone.