Originally, Barney served as simply a comic relief to the main story. In recent seasons, however, writers are seemingly confused with their directions, presenting the audiences with two approaches: How Ted meets the mother vs. How Barney picks up girls. This episode focuses on the latter approach with absolutely no development in Ted's journey to meeting the mother.
To extreme rarity, this episode is introduced solely from Robin's perspective. Whether intentional or not, Robin is distracted with the irrelevant Marshall and Lily development while telling her own assault story. For better or worse, this episode plays as a microcosm to the entire series, where the narrator continues to be sidetracked by less relevant stories.
Into Barney's life, more inventive dating methods were introduced as he sacrifices to maintain loyalty to Nora, which is funny and touching.
For Marshall, Lily, and Ted, this episode was rather boring. One positive in Ted's annoying interference with Lily's pregnancy is that Ted will be an undoubtedly caring father, which is something Lily obviously lacks (at least from her selfishness in this episode).
Overall, this episode is a filler, but fairly satisfying if there is no humongous expectations.