It does not appear that this was intended to be a DRO, much less a QDRO. Perhaps the judge could have modified the prior DRO to treat the ex-spouse as the surviving spouse, in which case we would only be dealing with the issue of whether that done posthumously was valid, but that's not what the judge did. The PA needs to be concerned about its fiduciary duties here, and whereas fiduciaries usually only have to review facts in this case it is incumbent upon the PA to consider the law.