When you have an adaptation of Konosuba, it goes far more than just having a simple light novel adaptation of goofy characters doing goofy things and supposedly saving the world in the end. In a statement, the strongest points that Konosuba consistently provides are phenomenal voice acting and compelling character dynamics. I swear most of the comedy wouldn't work if the story didn't try to establish their dynamics properly and how they interact with each other. Now, in some cases, Konosuba's jokes can feel juvenile and immature. Still, when you have a character that acts immature, childish, and unhinged, the only logical sense is to pursue these jokes and fit the comedy into the way the characters are portrayed. If characters have to change or act out of character for the comedy (not to mention if it tries to tell the same old quips that are lazily done), it would be detrimental to the anime's comedy, thus affecting the enjoyment.
Even when Konosuba is known for the outlandish humor and characters that on paper, should be unlikable, it still has moments when it knew it had to progress the story and be serious. When your story is about trying to slay the Demon Lord from total subjugation, it still gives the time to weave the plot as naturally as it could, whether it may be random or such, it's all part of the fun. As I'm saying this, I hope the staff still manages to give that feeling of satisfaction I felt when I watched the team all miraculously decide to group and make the most epic wombo combo in almost every last episode of Konosuba.
Thank you for reading.
