I would have enjoyed seeing that chapter in the Potter Extraverse: Seeing Gran Longbottom, along with Neville, walking into St. Mungos along with The Gryffindor Sword, and seeing his parents healed. Tho, that might have been too much, and not enough hankies to do it right. They might not have been healed, but they could have had a moment of lucidity to know that Neville had avenged them in their sacrifice.
Both of those were great ideas!