I meant no offense by claiming the omission notable. In fact I found it noteworthy for exactly the reason you stated - it opens the door to ideas for how to better handle weaknesses in races. My apologies if that was unclear.
As far as how vulnerability would work, without looking at the existing code I can't be sure. I would imagine all damage from a weapon of the type in question would be amplified though. I'm on vacation this week, but I'll be sure to look at it as soon as I have access to my laptop again on Friday.
The racial balance formula is a big issue that needs review, and if Madoc sticks around I'm sure he and I will tackle it soon.
