Refresh my memory about what Nelson denied. I thought she would see the witness in her chambers to discuss it. Has the defense formally appealed to the DCA? It is hard for me to see how she could refuse to give the witness at least what she gave the potential jurors, only people in the courtroom could see his/her face.
There seems to be some confusion about what exactly the judge decided, but she said. "At this time, the motion is denied." That seems to deny the motion, but allow for the possibility she will reconsider. The witnesses shouldn't wait to find out, or they may end up like GZ did with the W9 interview: before their lawyer can attempt to prevent it, the the beans have already been spilled.
As far as I can tell, no one has sought DCA review.