Chairs are already disabled as far as I recall, you can sit on them for a second but you were forced to stand up again, it even works on event exit map (I have no idea about the newer events though). As for disabling Cash Item visuals, Becca actually wanted to know if the players would be okay to be forced to wear class specific event outfit like Easter or Halloween events we already did and I suggested to her that we should make use of the new Thermal Top they added on Update 73 because they have a very simple design and has all the colors to cover all classes! Red for the Warriors, Blue for the Mages, Yellow for the Pirates, Purple for Thief, Green for Archers and Black for Beginners?
it is essentially already added in, however the coding for the outfits only show up for yourself on your screen and everybody else is still wearing their outfits. It was a typo when implementing the outfit IDs and should be fixed in the near future.