I wouldn't hold your breath for a change in the format.
The Saga of Darren Shan was a 12 part serial. As was The Demonata. It's how Mr. Shan likes to release his books.
Personally, I learned my lesson with The SoDS and now don't read until the entire series comes out. It was a nightmare having to wait for the entire Demonata series to be released; but it was much better being able to read all of the series at once. So, I've just bought Zom-B Gladiator but won't read any of them until the whole set is out.