It's a nice step but the league needs a sky judge

One guy for each game - he can be part of the crew. maybe a senior official who's not great at running down the field anymore. Everyone at home is already 'playing' sky judge with the angles they get. It would go a long way in making sure the correct call is made, and may even speed up the replay process so no one has to walk over and look 'under the hood' and ask for angles, etc.

Why they won't do this makes no sense? Another official to pay? Is it a cheapskate move?