
The default map seems to be limited to 120'x120'. This is great for small skirmishes, but when playing with large backgrounds (entire dungeons, for example), this is a little limiting.
Also, a function to be able to determine the units of measurement (meters, feet, kilometers, miles, inches, centimeters, etc) and square/hex size (you are going to include hex map functionality, right?) are really important if you want this to be truly system-agnostic.
Overland maps, vehicle combat, archery duels, mounted combat, castle sieges, large dungeons, and the like kind of require larger maps and flexibility with scale and hex type.
Also, a function to be able to determine the units of measurement (meters, feet, kilometers, miles, inches, centimeters, etc) and square/hex size (you are going to include hex map functionality, right?) are really important if you want this to be truly system-agnostic.
Overland maps, vehicle combat, archery duels, mounted combat, castle sieges, large dungeons, and the like kind of require larger maps and flexibility with scale and hex type.