@Bob Jonkman It is highly character-driven.

It uses key characters, the Empire, the exile, Terminus, Psychohistory, two kingdoms instead of the Four Kingdoms and some echoes of half of the first book and fainter echoes from other parts of the series, while the main story maps roughly to half the first book.

It shifts characters around, fleshes them out, gives them more connections between each other, adds its own world concepts and turns key characters into women. There is no Scientism, only straightforward diplomacy, and there are fewer Seldon Crises (only one).

Apart from the pacing I think it's a far better TV series than a faithful adaptation would be. The concepts it adds are interesting and fit with the world and give it depth, they're not just random stuff.