A bunch of Talents were copied over from D:OS 1, and Larian didn't always bother thinking about how they would work in the new gameplay system.
Hence, Bigger And Better, which still gives a laughable 1 Attribute point. It should give something much better, like 4 attribute points or maybe +1 to all attributes.
Leadership isn't bugged, it is not supposed to do anything for the one who has it. Encourage should, though.