Dilsey's Section, its overrrrrr!

What is the source of the tension in Dilsey's section?
What is Faulkner asking us to consider here?

Dilsey's section is different than any other section of the book because she herself does not narrate it, it is in third person and rather follows Dilsey through her day. The Compson family has slowly been disinigrating, however with Miss Quentin's escape, the family seems to altogether seem in ruins. I think the main thing lost is hope, for with Quentin's suicide and Caddie's permiscuous nature, Miss Quentin was almost like the last hope. Though she showed signs of being like her mother, the rest of the family looked the other way because she was supposed to be different. But she let the family down, and with her escape from the family came a rupture in the rest of the dwindling families ties that were left in the Compson household.
-I think Benjy longs for Caddie how she use to be and stability.
-I think Quentin longs for escape and to go back and fix wheat he believes has ruined his life in the past.
-I think Jason longs to be noticed. He was the normal child, but with that came him being left behind, still living with his mother in the town he grew up with. I think he harbors so many jealous feelings toward his siblings that he longs for a totally different life. And the only way he saw getting out was getting rich off stealing Quentin's money from Caddie.
Quentin and Jason both seem to base their identity off of their sisters loss of virginity and her slutty ways. They are both consumed with the fact that what she did impacted their lives in such a drastic way, but in fact if they had just moved on they would have been so much better off.
The source of tension in this section seems to be change and how none of the family members seem capable of dealing with change.

Why does Fauckner end with Dilsey's section? Of all the sections it is easiest to understand, but seems to leave the reader with the most questions asking why...