Warrior Final Attack after Big Bang

That aspect isn't changing.

And Joe, regardless of what it strikes within it's radius, it's going to get hit whether it's in the multi-hit category or the single hit category. It's extra damage. As the other guys said DPS is DPS. 40% may not be each time every time, but that's still enough to trigger one almost every other attack.

Unlike you, I've actually played these classes with Final Attack, and it doesn't provide a significant or noticeable bonus in training.