Ignoring my previous post, I thought I would show where I am in fiddling with the Weapon vs. AC Chart after my analysis of the iterations. I've been playing at it and have this as the leading contender so far:
I've been doing this partly through feel and partly through analysis and I'm only partly happy with it. Another idea I had was to lump types of weapons (axes, swords, etc.) as all having the same number and then applying +/-1 based on size. In that table below, the TN listed is for medium, one-headed versions of the weapon with modifiers below:
Finally, I thought more about how King Arthur Pendragon does this thing and started some ideas along these lines:
So...so. Anyway, that's where I am right now.