My thoughts so far are that the added content is pretty decent overall - for reference, I didn't directly pay for the DLC as I had the pre-order full game with 3 DLC version.
The big island is a nice addition, and having specialists bring fertility is a great touch. I also like the new obsidian market - it adds harder market to purchase things as money is easy late game.
That said, the volcano going off so often gets a bit annoying, and when the ash cloud rolls in for about an hour, it’s hard to see anything. I kind of wish there was an option to disable it or at least make the cloud more translucent.
Curious how much others have played it so far and what your thoughts are?