Can we just talk about how the new Tardis clearly signifies the Doctor becoming very distant,cold and emotionally detached. The lighting in the first picture is bright, but in the the new picture the Tardis is barely lit at all, and it seems dark and gloomy. In my opinion the lighting and design correspond with the Doctor’s emotions. After Amy and Rory’s departure the Doctor became mean and uncaring, and the Tardis changed. The Tardis changes at significant times in the Doctor’s life, usually a regenaration, but the most recent re-design was most likely brought on by the Doctor’s grief and emotional change.