New Features > New Land... I mean what so good about new land? You cam probably explore all of it than less of a day then your done. New features would give us weeks if not months of new enjoyment, & features would be a lot easier to add than land.
In this case I think we have both.
This DLC will have the most new game features so far of bethesda DLC.
And I think we have plenty new land to explore, they are just keeping it under wraps.