It doesn't really matter about the time in between airing, because they make episodes decently far in advance. For the Japanese team, they have to write, storyboard, animate, record, piece it together, etc. The American team has to translate and record to fit and that. As far as I can telly, the American team can get all their tasks done faster than the Japanese team (uh, bc it's less of a task; not because the Japanese team are Slowpokes lol). And they all have it done long before we see it. I'm really not worried about the American version diverging from the Japanese. As stated; I'm wondering what they'll do with Decolore. Will they air it in a different timeslot or?
I really hope they let everyone have fuller teams and have ways to feature all the Pokémon! Maybe some that got only a cameo in previous generations or weren't that important at all. MAYBE PORYGON AND JYNX WILL BE AROUND EVEN