Well, there's weapon focus.....
Mechanically, WF, WS, GWF, MWM are all top 5 feats for increasing damage output.
Weapon Focus is a 9% increase, and the OP seeming wants something that is 4 times as good.
No, I don't but thank you for putting words in my mouth.
Hawkeye
I wasn't looking for something fully equivalent, but generally equivalent. I know that allowing full BAB would be unbalancing. I was just wondering if something was out there officially to allow it and in what manner.
Hawkeye