Lol, I like it how Hata-sensei is doing what we call "curcol" in my language. It's so Hata-ish and so funny :D
Looks like he wants to end HnG soon, but he was messing up with making too many characters and ships. He even ask the reader to support Nagi more on the cover, which is I believe still be the main heroine for Hata.
And, the theory about Nagi will make manga based on HnG finally come true, in a surprisingly manner, indirect confession that hit right through Hayate's "Airhead Gigolo" trait