Melee weapons in the warband sim

I am struggling with melee weapons in the warband sim.

Here is what I have so far:

NW no weapon, for example, animals like wolves, etc.
1W one-hand weapon, the default choice
2W two one-hand weapons, dual wield
2H two-handed weapon
WS one-hand weapon and shield

Effects on attributes:

NW no effect
1W no effect
2W +1 attack, +1 parry
2H +2 strength, -2 parry
WS +2 armor, +2 parry

There are obvious balance issues, needs major work.