Hi Andrea,
I would say that in most requirements it’s ok that you have square grid in 99% of your floor area but triangles etc in the edge positions. It is however important that when you make your statistics, that you don’t say “15 of 100 points --> 15% is receiving daylight”. Instead, use a weighted average, where each point value is weighted with the face area of the grid. In this case you will mitigate the difference in face sizes.
Best,
Mathias