The tumult and roughness of the first half of the novel has given way to a simmering pot of resentment, melancholy, and naive youth.
Young Catherine is quite charming and a relief after so many terrible people. Linton, though sickly, is mostly a twat. In fact I actually sympathized with Heathcliff about him.
And Heathcliff is now more interesting; his evil is actually impressive.
I like this shift.