I'm glad you liked it! Haha, we had to workshop the last stat for a while before landing on Sustainability. It was "warmth" for the longest time, and we knew that wasn't making it into the final version xD
Agreed, it still needs some more refinement. One idea that we're working to implement for a post-jam update is to have some speech bubbles appear from the dragon to tell you what they do and don't like about the current outfit. Hopefully that helps give some direction!