Limited customisation options (hair, facial hair, accessories)

Good idea. Another good idea would be to be able to edit the appearance of players, who aren't scanned. Sometimes a hairstyle just looks completely off, or a player has a 'lean' body type, but you know from watching him IRL that he should be 'normal' in stead. Winter gear still can't be changed either. You can give a player long sleeves, but once the cold weather arrives, he will run around with bare arms again.

Many more hairstyles etc would be nice to have. But the ability to edit player appearances should come first IMO.