We are experimenting with giving 2H weapon users (or those weilding a 1H weapon with 2 hands) a +1 upgrade to the entire Ability Dice Chain of the applicable weapon (e.g. upgrade your Melee d6 > Swords d8 > Longsword d4 to: d8 > d10 > d6, etc).
One average, this works out to +1 to +3 threat/attack (depending on if they have specialization or Mastery dice). We'll let you know how this turns out.
The players thought the above solution was too weak, and made the following suggestion:
For 2H weapons (or 1H weapons weilded in two hands) - add 50% (before weapon harm bonus) to the final threat.
They also suggested a person weilding two weapons should: roll the ability chain of the 2nd weapon and add it to the first weapon's threat.
This has the advantage (over the previous solution) of extra threat increasing proportionately as your skill increases (it is not static).
Our group agrees that gaining a huge increase in offence (threat) is a viable alternative to giving up an entire Defence Pool (deflect). It makes for interesting player choices in weapons.