The core theme of Vinland Saga is introduced in its very first episode: "You have no enemies. No one has any enemies. There is no one that you should hurt." While not everyone agrees with this perspective, many people believe that violence is sometimes necessary, albeit in extreme circumstances. While these individuals may find enjoyment in the first season, they may not appreciate the second season. Season 2 is specifically tailored for those who genuinely believe that violence only begets more problems. This philosophy is considered extreme even in our modern world, but it appears particularly audacious within the Viking world of Vinland Saga.
That being said, there are moments in this season where the pacing feels slow. The first 10 episodes, in particular, tend to drag on, but the second half of the season picks up and becomes more engaging. This could have been a 6 episode arc to get us to where we end up.