The BTB Maps, especially for Halo 1, need to have the rest of their vehicles enabled. For example, Infinity only has 4 Warthogs on the entire map for Slayer and King of the Hill. It should have 4 ghosts, 4 rocket hogs, and 2 banshees (as well as the 4 regular Hogs, as it always does in Halo PC). Danger Canyon is also missing the Rocket Hogs.
Without these vehicles, and with only 12 people on the maps at the moment, Big Team Battle just doesn’t really work on a number of maps. It’s more a game of hide and seek than the chaos we’ve come to love.