With the module coming up. I thought I would throw this out with some heavy wishing on the next mod.
How about giving WF a few more of their Feats offered in "Races of Eberron"
like the following:
Cold Iron Tracery = Unarmed Combat damage is treated as cold iron weapons. Also, gain +1 to will saves.
Construct Lock =+2 bonus to dmg against constructs. Critical hit gives another attack. If the 2nd attack deals damage enemy must succeed at a Fortitude save of (10 + 1/2 char level + Con Modifier) or be stunned for 1 round.
Jaws of death = bite attack that deals 1d6 dmg. treated as secondary weapon.
Silver Tracery = Unarmed Combat damage is treated as silver wepaons. Also, gain +1 to Fortitude saves.
Unarmored Body = Loses the normal +2 composite plating bonus, loses the light fortification bonus and has 0% arcane spell failure.
I know there's a couple more. But I'm looking at implementation in DDO.
The tracery's, jaws of death, and unarmored body should be no problem. They could probably tweak Construct Lock to a Favored Enemy option for WF.