I believe that, once an umpire makes such an egregious "error", he should be removed from the games -- especially in the World Series. He had the best view of the non-catch, standing right next to it. Every other umpire saw it the correct way from ALL their different vantage points.
MLB needs to hold umpires accountable for "mistakes" like that. Just like any other profession. If you can't do what your job requires correctly, then find another profession. I'm sure there are plenty of people/umpires who would love the opportunity to be there in your place. These games are too important to have that happen.
If this was years ago, or maybe even a year ago, I doubt there would be any overturning the call. And that would be a shame. #gamechangingmistakes