To be able to change the hair colour/style, makeup, facepaint, paintjobs of Exos etc wouldn't break the lore of the character if that's what Bungie is afraid of. I can understand limiting things like not being able to change from a Human to Awoken, or Exo to Human etc or even changing skin colour, but simple cosmetic changes would just give the player a little more connection to their character they may have created way back. (and might want to update a little!) I know some who lost a few key details in the updated graphics - scars and eye colours were lost (like blind eyes and such) If they can change that for us, then why cant we change it ourselves.