We played with the Legends, Through the Seasons, Corrin Evertail, and Extra Extra! mini expansions. I haven’t played with the bigger expansions very much, but these little modules definitely make the base game a lot more interesting without adding too much more complexity.
There are a couple cards that lead to more direct interaction, like The Fool, but otherwise it’s indirect blocking and card denial. There are other cards that allow you to gift cards to other players which can clog up their hand sometimes if they had other plans.