Hey I want to start off by saying I loved your work with mizu and terra and I'm really excited for this set as well! I just wanted to share some novelty ideas that I had.
I think it would be really cool if you included more novelties directly related to zuko and uncle iroh. Some things I had in mind were a silhouette of uncle irohs signature bun and beard, a silhouette of pony tail zuko from season 1, as well as a silhouette of short hair zuko from season 2.
My favorite novelty that you included in the ic is the zuko eyes with the burn mark, I think it really ties the entire set together and its the main reason that I want to buy the set. I would really love to see another pair of zuko eyes with the burn in r1 format because id prefer it as my esc key rather than the same aang eyes and arrow in r1 from the previous sets. When I think of fire nation I think of zuko or roku, not aang. Other novelty ideas I think would be interesting include avatar roku, or zukos severed ponytail falling as well as iroh's severed bun falling from the scene when they cut their hair together and went on the run from the fire nation.
As for the deskmats, I love the ones you've designed, I think another great idea would be a deskmat themed around zuko and iroh sitting on the ground as beggars when they were on the run from the fire nation. I have attached the frame I am reffering to.
I think it would be nice to have zuko with his hat covering his face and iroh next to him in the corner of the deskmat, or simply just a silhouette of them as beggars in the corner of the pad with the rest of the empty space taken up by empty street on which they were begging.
This is just a little bit of input I wanted to give related to the set. I'm really looking forward to this set and I thank you again for all of your great work!