I would like to take this opportunity to point out that most inaugural seasons operate (even if not by design) as foundations for theme, characterization, and other elements. It provides inspiration for future seasons.
Season one only has one item that held it back artificially, and Lauren and company course corrected it in season two. It became more of an ensemble show starting with the second season. All the characters started to learn lessons in first person. Twilight was no longer the anchor in most of the episodes. This trend continued and single and dual character focused episodes are common. Character growth feels more natural when you spend more time with one or two characters when they are featured.
Also ... Suited For Success still stands as one of the series best episodes to date. I've heard and read enough times that Rarity was often dismissed or maligned until that episode. The Best Night Ever showcased the flaws and potential growth of each character while not deviating from what was already established ... and it was a pitch perfect parody of the Disney fairy tale trope with an ingenious ending.
Party of One, Swarm of the Century, the origin of Rarity and Applejack as good friends are just a few critical episodes that looked at key character traits that were later expounded upon in future seasons. There are more, and while I agree that season one had its mediocre episodes ... it also was no stranger to high quality family content and I personally feel that its foundation is responsible for later brilliant episodes as well.