The geographic pods within each division are important for scheduling reasons: These will be the most frequent matchups on the schedule. The winner of each "pod" will get a playoff spot, unless that team is the overall division winner, in which case the next-best team in the pod gets to go.
The driving force behind all this is regionalization. Build those rivalries, starting in the minors, which have already become more geographically aligned and presumably will only become more so over time. You don't ignore the national aspect, but baseball is already local to a significant degree. The structure of the sport ought to reflect that. -- Bradford Doolittle
Shut the f*** up Bradford. Don't make this MORE confusing than it already is.