Each patch I'm doing the same routine:
- Launch the game
- Use dual welding to check if it's working
- See that it is not
- Quit the game and wait for the next patch

Almost a year with the two weapon fighting style broken.
At start the attack bonus was normal but everyone was getting the damage bonus from abilities (which should be a feat from fighter, ranger, etc.)
And now the damage bonus is right but everyone has lost the attack bonus from abilities.

At this rate the next patch will get us a right secondary attack but maybe the main one will be broken?
Since patch 4 the two-weapon fighting's character are not viable.