2. It still looks like bootstrap. Telling people, "use bootstrap, but quickly change the fonts and colors and maybe add some images" isn't helpful. I wouldn't mind an article outlining how to use LESS to make bootstrap not look like bootstrap (which would involve, at a minimum, not using a 12-column grid, because I associate that with bootstrap more than anything else). And that seems like something developers should be interested in.
3. There are an ungodly number of blog posts that say, "use bootstrap, but change the fonts etc so that it doesn't look like bootstrap." The specific details: "use textures" for example, made the example site look worse, so it's hard to see what this article added.