Currently in the outfit station players can only dye their armor, weapons, costume, and hat. There is a lot of empty space in the current outfit station UI (under "costume and hat" tab) that needs to be filled up.
I have a suggestion to add in more stuff that can be dyed such as hair, body markings, head markings, and skins. With this-- players can make his or her characters even more unique.
In the outfit station the dyes that are locked should have the option to be previewed to see what it looks like on the character's current outfit. Also there needs to be more options to unlock dyes besides achievements.