Giyuu's 11th form is cool, I wonder how it will be in the anime (from when he used it against the spider, no way the anime gets this far without another season, lol)? I think it would have been a lot cooler for Giyuu to respect him at the end like Tanjirou always does to his opponents and tell him his name then. Oh well.
To have angered Tanjirou you know you did something wrong. His speech about the weak was a great way to put it. Fantastic.