{{DEFAULTSORT}} isn't the easiest thing in the world to manage, and for long or awkward article titles, then having to type out the name of the article manually is a source of frustration and errors. Worse, the page name is sitting there in the placeholder text, and you can't even copy and paste it. I really doubt that anyone wants to re-type "Suzukake no Ki no Michi de "Kimi no Hohoemi o Yume ni Miru" to Itte Shimattara Bokutachi no Kankei wa Dō Kawatte Shimau no ka, Bokunari ni Nannichi ka Kangaeta Ue de no Yaya Kihazukashii Ketsuron no Yō na Mono" (real article title) in that field, and there is no good alternative that doesn't involve closing the categories dialog first.
Could we get an 'insert title' button, or somehow make it possible to copy the placeholder, or something else?