I had a really long look for a solution to this problem. I was disappointed and angered by the fact they got rid of the calculate geometry tool.
Once I got over that disappointment, I hunted for a solution and came across this thread. I had tried to use the Add Geometry tool, but the point features do not have a 'z' or 'm' value so the tool crashed. When I tried he add X Y coordinates tool, it was giving me the information in meters. After trying some other quick little scripts and lots of other reading, I realized I had to use the Add XY Coordinates tool, but under the Environment tab, I changed the output coordinates to Geographic Coordinates, WGS 1984 and it gave the information as decimal degrees. I hope this saves someone some time.
THIS ISSUE IS FIXED AND THE TOOL HAS BEEN UPDATED TO DEAL WITH THIS.