I wish they would extend the length of each episode. Instead of dedicating an extra hour to Talking Dead, cut that in half and give the extra 30 minutes to the real show. I realize this has an impact on the production side, but it would be a much better use of the time.
As for the thought of not focusing on a single group per episode, I hear you there. The Kingdom seemed pretty interesting and different, but now we've gone almost a month without seeing them.I think if the show was longer like I suggested above, it would make it a lot easier to jump around a bit within the episodes.