Bleach's world building problem, ironically, comes from not enough character design variance. So, the basic premise of the Soul Society is that they're the ghost cops of the entire world, seeing as how dying is universal. But, every event is set in what is effectively an Edo Japan setting, implying that the Soul Society only really has jurisdiction in Japan. It's further complicated by how the 13 squads are bunched up together in the same place for insufficient reasons given their organization is roughly similar to prefectural police organization. Except the reason why police are organized in that way is to supervise various territory throughout the country, which does not really exist in the Soul Society. Some have their own niches, but overall, they're very interchangeable. So, what would mostly fix this problem? Ethnic costume designs signifying where a squad comes from. Like, a squad could be based around Spanish Conquistador armor or Germanic mercenaries or Zulu warriors (who must be tanned oppai girls) and so on. Without a word of dialogue, it communicates the idea that the Soul Society covers the entire world and its capital just happens to be in Japan for plot reasons.
That's not getting into lore that never gets explained ever because power creep fights are the lifeblood of the entire story and eliminate the very idea of having squads and organizations, but that's the sort of thing Shonen Jump demands, so clever tactics and strategy is a non-starter for a battle manga.