I've drafted a new, simpler version. Six columns to four, reduced all stats to two levels, and damage will now be classed by small, one-handed, and two-handed.
|Swords, Spears, Staffs||2||2||1||1/2|
|Axes, Maces (1-handed)||1||1||2||1|
|Halberds, Poleaxes, etc.||2||2||2||2|
The new version can be summarized as - daggers are good at nothing, swords and spears are good at attack and defense, axes and maces are good at penetrating armour, and complex polearms (halberd, poleaxe, etc.) are good at everything.
This sacrifices some of the detail I'd like, but I think the ease of learning and remembering is worth it.
It's a damn sight prettier than the weapons list from the D20 SRD - that list is incredibly complicated, has no internal logic, and no relation to the real world.