Custom game matchmaking in Halo 4?!?!

343 Industries please make an option to host custom game lobbies that others can join through matchmaking and those searching for custom games are presented with a list of custom game lobbies with open slots and what game is being played in each lobby. This would hands down make Halo 4 the best game of the series because it would allow players to fully utilize and enjoy the custom game and forge tools at their disposal.