I personally enjoyed the DLC, I thought the new area and characters were nice and even found myself hoping for more voice acting to better flesh out their personalities.
There are four new rare jumbles in the new and old mines.
As someone who has played this game for a while I like that it adds reason to go back to previously explored areas and keeps them relevant to old players while adding exciting content for new players.
I hope with future updates they continue to add small new things to old areas.
Fun fact:
Did you know that Finn and Herron have the same birthday? Autumn 21.
Who else has the same autumn birthday? The Marquis.
Out of the new Romancable characters Phoebe, Kestre and Gryff all have the same birthday of Summer 1. Who else has the same summer birthday? Galan.