He is making a valid point, though.
Even if they do implement shields, it may not be enough. (I say may because those shield are pretty powerful and trying to think of the repercussion they would takes more time than I want to allocate it right now.) S&B DPS is way behind TWFers.... and still have lower AC potential than TWFers. I mean, he did made you say "Shields are not just for AC", didn't he?
Buit a TWFer could acheive the same by putting a shield on when needed.