I mean its the only way this makes sense unless they intend to put further content amount into a smaller package to counter the "timeframe reduction" topic.
I mean some of these content like Rootlands/Undermine or World Soul Center of Earth Zone could be Megadungeons too.
I'm not really holding my breath for Undermine at this moment in time. It is possible, but I certainly am not sold on it at all anymore with Rootlands.