Picking the appropriate standard of review was a tricky proposition when Frank Russo appealed from an order that wiped out his $9.9 million judgment against Corey Steel — because the trial judge stepped aside during post-trial proceedings, and Corey Steel’s request for a new trial was granted by a successor judge based on his disagreement with the first judge’s ruling on expert testimony.The amount of damages was the only question for the jury in the admitted-liability, personal-injury case. Russo, who …