I would like to see this gametype added, but I don't think it can be implemented well because a vast majority of the maps are asymmetrical in design. One team will clearly be advantaged. One flag is an interesting option with rounds being switched off though. Assuming that decent maps can be decided upon, I would say that the flag runner would have to have severe limits on mobility (as most of the maps are incredibly small). No sprint, only single jump (no second jump ability such as blink or glide). At the very least these are some starting suggestions.