i mean, ok, this is taking a bit, but it's the first time the abyss harbors a city and a society.
we had the city above, the settlement of rozen and now this.
of course it will take a bit to show how the distorted created a new society and how the rules of the abyss made this place exist, and of couse it didn't simply gow out of nowhere, it needed to have a background and the explanation for it was really cool and made in abyss like, with the stones and the polluted water and everything.
now we are seeing faputa as a manifestation of humans and abyss powers, and the conclusion of a whole city and probably the death of a level master.
after this there is the big finale with the golden city, you really think the author is going to end everything fast? when you create a world you want to reach the end as fast as you can to show the depth of your creativity, but when you actually reach it you try to make it last as long as possible, you try to perfect it and to explore everything, you simply whant to do everything in a good way. i think anyone that ever wrote anything and showed it to others can understand these feelings