@cl said:
...I would rather click on a face and select divide, type 10x9 or 50mm or some other version of how to grid it and it does it...
You can try this one Generate Floor Tile Grid by Sdmitch....
http://sdmitch.blogspot.com/
Generate Floor Tile Grid tutorial
https://docs.google.com/file/d/0Bw8zdmaKDWIfQ2o0ZzhSRWpJdEk/edit?pli=1