Some interesting things I noticed about Amon’s Hat from the ARR Art Book – it was originally going to be more intricate than it is now.
For example, long ears are hidden by the hat (aside from Miqo’te). But here, we see that Elezen (top) and Lalafell (bottom) ears were originally accounted for.
Also, bottom left, they considered /visor removing only the black inner part of the visor instead of what it does now – removing the entire mask. That was neat, but I think I like having the option of completely removing the mask.