[PvK]

All good points and interesting valid ideas. I'm not sure there's any material disagreement left here.

Seems to me that for ultimate correctness purposes (not necessarily this mod), it doesn't matter much what the head is like on an axe/mace/hammer/pick - it should be possible to make such a weapon as good at length/attack/defense as any other, with the exception that hammer and especially mace don't need to strike in a particular direction, which advantage might or might not be considered to be worth a +1 relative attack mod. However there might be tradeoffs between those values and the resulting damage and resources too.