Once Adywan omits the scene with Luke asking Leia if she remembers her real mother in ROTJ: Revisited, then Padme can die in Revenge of the Sith.
Sure, but the whole point of this edit is to improve ROTS while keeping it consistent with the rest current canon, in which Padme unambiguously died in/just after childbirth. There are flashbacks in the Vader comic about her funeral, among other things that require her death in ROTS to occur in order to keep consistency.