I would like to have more customization in the character creator such as more vibrant colours for the eye colour and hair and more hairstyles and eye types. Such as the Inn girl in Hoddimis.
There could be a competition for designing clothes and hairstyles for costumes for example a reward could be money or some in game items/zeny.
Obviously people need knowledge on how to implement 3d models in this game aswell as knowing about the limitation the game places on poly count and texture size etc. shading.
I hope the implementation of a hairstylist in every major city would be something we could have in the near future.
As for me i could try to design some hairstyles for the game as i have some amateur knowledge about 3d and animation in Blender.