I think that was kind of rude. He's just trying to make his own site and gather ideas, which I think is great. There are some sites that don't really take into account some learning styles that may work better for some people.
For example: Rovian's idea about making lessons by making lessons progress similar to how it is in Japanese schools is a great idea, I don't see it too much on the web. That's how I learned my kanji, by grade level.
I think that having audio is great, too. Might consume more bandwidth for the website, but there's only so much books and text can do.
Maybe also work with how to actually write the kana and kanji, like stroke orders. For kanji maybe break down the radicals to help people understand the word better (like the radical that means "water" is used in kanji that mean "sea" and "pond" etc... ).
Ganbatte Roy-san!