Does anyone else think that if each square represented 2 feet instead of 5 fighting would go a whole lot better?
Your 10x10 room with the orc and the pie now has 25 squares instead of 4!
You can put more people into a room, more in a corridor; movement flows a lot easier. Tactics can improve. OAs are less a pain in the ass. Same goes with reach.
Squares still have the same rules; they're just representing a smaller area. So a medium creature still reaches only adjoining squares, a large adjoining squares plus one.
-W. E. Ray