I generally have sympathy for GC and the devs, but he should really just get off Twitter. Half the time it sounds like he's provoking people on purpose.
I think part of it is that he's giving an explanation for a change, not going over their whole design process. Kind of like how everyone took the hybrid tax as the overriding design philosophy when he was just giving a simple truism. He's arguing for why Sac got nerfed and you can't really read much past that.
The overarching theme, though, is that the devs can never put themselves into a position where the players can take data or argument and demand a change so GC is going to blow smoke even if you try to use his own arguments against them.