What I would like the most and would actually buy from the Crown Store would be something that would allow me to Re-Customize my character.
For some reason I have made my character the height of a dwarf when I actually now wanted him to be tall as a giant. I look ridiculous amongst other players because I am so short.
I believe many people perhaps rushed through their customization because they just wanted to play the game.
This should not allow you to change race and alliance but solely change the appearance or gender of your character. No harm would be done to anyone and people like me would be pleased.
I have no idea what the pricing should be, but something around 500-1000 crowns seems reasonable.