The new Blackfathom Deeps is under Instances in the settings. Normal is the old 5 player instance only in regular Classic and 10 is the new version in Season of Disocvery. The game client considers the new BFD a 10 player instance/dungeon and not an actual raid.
AutoCombatLogger is a World of Warcraft addon that automatically enables or disables the combat log based on location. It's specifically tailored to control the logging based on the raid name and difficulty.
Logging can be controlled for the following locations:
Currently, you cannot customize instances and world.
It also provides an LDB launcher and a minimap icon to control it.
Options are set under Interface Options or typing /acl.