edit: I agree with cornerman.
Not this shit again, please. This quote comes out in every topic of The Order and every time it's taken out of context and people do not even try to understand what the guy meant. It's just disrespectful, do you thin RAD is made by a bunch of idiots?
The bold is the key. If you're going to make a story driven game, the one thing you absolutely want is that gameplay is consistent in the lore you created. This is why story becomes the most important component and everything else supports it. RAD, with pics and interviews, has already shown a crazy level of detail about the lore that also reflects on gameplay: an example are the weapons, that are not just a work of fantasy.
Sure, they could put gameplay first. They could make Galahad to spit fire from the ass****, it's funny and it adds variety (?) but then, how are you going to justify it in the story?
This is why gameplay-focused games has almost always a very poor story or a very "imaginative" (I can't think of the right term) story.
It's not different from great games like Deus Ex Human Revolution or The Last of Us, both of them have elements in the story (Deus Ex, with the implants for example) or the characters themself that deeply influence the gameplay.