I would not like a moment like this at all. One of the key elements that gives Steven Universe its emotional weight is The Crystal Gems missing their leader. If Pink Diamond could come back without having to sacrifice Steven, it would cheapen all the emotional turmoil and character development Amethyst Garnet and Pearl and to go through in her absence and it would make Pink Diamond a bad parent because she should've been there for the first 14 years of her son's growth. In other words, this would be the equivalent of bringing Bambi's Mom or Mufasa back to life.