So, TWF, a feat that, at the cost of a slight penalty, lets you make more attacks, and thus deal more damage, that you can spread over more opponents, has been eliminated.
By the same token, Power Attack, a feat that, at the cost of a penalty of your chosing, let you deal a bit more damage, should be eliminated. Especially considering that, contrarily to TWF, Power Attack doesn't result in a greater odd of hitting some opponents (very high AC, concealed or invisible opponents). Sure, it can help more against high DR opponents -- but DR has been nerfed in 3.5. anyway.