While testing one of my addons using Blender 2.93 beta from today, I noticed that Add Grid changed the interpretation of X/Y Subdivisions, both in the user interface and when using the Python API,
Blender 2.92 and before: subdivision range from 2 upwards,
2 produces in a grid with one face and no subdivisions
Blender 2.93 beta: subdivision range vom 1 upwards,
1 produces in a grid with one face and no subdivisions
2 produces in a grid with four faces and one subdivision (three edges/vertices)
and so on
This happens both using the UI and when using the Python API. Is this breaking change really intended? Should I open a bug report?