Alternatively you could just travel to a new town inside the existing savegame, keeping all the archievements, money, XP and fluffiness rate!
Maybe go to the newly opened hairdressers and swallow some bitter weightloss pills from the pharmacy so the experience feels more then a new start but with all the archievements from the past!
BTW: i'm more interested in lowering the fatty rate again in future updates - which also was already confirmed!