I just tried to equip my Lord coming from 7 with a Bec de Corbin to have an offhand weapon pushing my skill with maces and find that when imported, the weapon becomes an extended and twohanded Polearm-weapon.Wiz7:
primary/secondary
short range
mace/flail
Wiz8:
primary
twohanded (although not stated in item-description I was unable to combine it with a dagger in second hand. Although the secondary slot is available with this weapon, I can't use it.)
extended
polearm
Are there other changes, which became obvious to you veterans out there? 