The 5 ft space feels a little big. So, I wanted to see where this idea would go: what if the base scale was changed to 1 yard/1 meter squares?

First advantage: it is more easily metricked, only really requiring mile to kilometer conversions at a certain point. The base 30 speed turns to 10 squares, so that's fine. 25 ft would need to be rounded down to 24 but that's OK.

Obviously, map scales would be thrown out of wack. I make a lot of my own stuff so I'm not concerned about that right now. I just want to explore where it goes. But, maps would convert on a 3 to 5 ratio (a 3 by 3 space on old maps would turn into a 5 by 5 space).

Where I think real interesting things could happen would be in weapon reaches. We could have more nuance between light, one handed, two-handed, and reach weapons. Reach weapons normally had a reach of 10 ft, so cutting that back to 9 feet would be a reach of 3. Light weapons could have a reach of 0 and 1, medium weapons have a reach of 1 and 2, and long weapons have a reach of 2 and 3. Extra rules can be added for getting into reach, giving light weapons a goal of getting in close to deny someone use of their big weapon, while a large weapon user would want to keep someone at a range.

Monster sizes may need to be adjusted. 10, 15, and 20 ft spaces almost line up with 3, 5, and 7 unit sizes.

Can anyone think of any other fun stuff that could be added with a more granular grid?