Well, the important point for me in Haganai is the perspective from a loner that was integrated within the characters. And this makes this novel standing out amongst the other ones - the typical harem series. The author knows what he writes about (he is/was a loner and Haganai is maybe a cathartic exercise for him).
The story focus now on Kodaka and how he finally
If the author continues what he aims for - he wants the main character to lead a happy and fulfilled life, then this novel will be probably develop like Clannad Afterstory (without any drama, it's still a comedy with a positive undertone): Girlfriend, pregnancy, marriage, kids/family. Maybe the author wants to describe all this steps until the end (like the Rika ending in the PSP game).