It is impossible to review this specific file without addressing the resolution. Watching a modern, effects-heavy superhero show in 240p is a test of the show's storytelling mettle.
The episode picks up immediately after the penultimate cliffhanger, with the world on the brink of collapse due to the merging of Earth and Bizarro World. The pacing is frantic but controlled. Unlike many CW finales that feel rushed, this episode takes the time to breathe, allowing character arcs to land before the final punch is thrown.