Crisis Theory and Conclusiveness

After finishing the season 3 finale, I felt unsatisfied. Watching the post credits scenes helped some, but this season definitely wraps up less neatly than its two predecessors. In the time since watching the finale, however, I'm wondering if that matters.

We learned a couple of weeks ago that the show was renewed for season 4 and Joy/Nolan have 6 seasons planned, so does every one need to tell a satisfying story on its own? It is disappointing that we won't get to see the continuation of the story for several years, but I am at least glad that it appears the show-runners have a story in mind that they've planned out seasons ahead of time.