The people who make this show are making shit up as they go. There is no plan. Hell, there probably isn't even an outline. And that's the show's big problem
Everything else (Finn's wimpification, the shipping shit) could be justifiable if it was actually leading to something. But it isn't and this isn't helped by the fact that the show is afraid of changing the status quo.
People make fun of Steven Universe's pacing, but I genuinely feel nothing substantial has changed in the last 3 seasons of this show.