Arata should have already learned all those points you listed, right? Chihaya got her current playing style from him, since she was so impressed by his aggressive speed that set him apart from all the other players back then (that she had witnessed, anyway). Chihaya got stuck in that twisted ideal, but I can't really see it as being anything special to Arata himself, especially since Arata was looking up to the old grandpa, who hardly could have played with uber speed anymore. Plus he should have seen much more at a younger age already, thus experiencing the troubles Chihaya is only seeing now and learning from them early on.

Bah, I want to see him play even more after this episode. Although I also feel like Chihaya couldn't offer him much resistance. I didn't feel like that some episodes ago when Chihaya still felt strong, but now that the show is making her seem unnecessarily weak, I can't help it.