Each one of the isles in the Land of the Green Isles have familiar locations revisited and expansions where you were unable to go in KQ6. Obviously there are also KQ6 locations that you can't revisit because they have no use in the plot.
I was personally very delighted to get a look at these new locations and they all feel totally right for the respective isles imo. They now belong to my mental map of the Isle of the Crown and the line of where Roberta and Jane's vision ended and César's starts is a blur... I will never be able to play KQ6 anymore without thinking that I know exactly what is behind the corners of the screen where you can't go, and neither will you!
