Koh Lanta is not a very popular tourism destination in Thailand and i've been there during low season.
Even so, it was my favorite place in a full 13-places-1-month-travel though Thailand and Vietnam, because i've met the best people there and we had all for ourselves.
You can see some of the thousands of dragonflies that were there in the left of the frame.
Koh Lanta, Ko Lanta, Krabi, Tailândia
I like this shot a lot. There are a few small things I would consider trying in post. The first is the crop.
First, try a portrait crop of this.
Second, try a crop where you bring the right edge of the image to the middle of the rock on the far right.
Third, try a crop where you bring the right side of the image to where it first touches the rock on the right.
Those may completely change the feel because of the large amount of negative space on the shot.
Maybe a little bump on the dehaze to make the clouds pop, very little though.
You might play with the contrast, but not sure that would make a difference...