Re: sakura's background
You're right, but don't you think that Sakura isn't that important to create her Background story. I mean, we havent seen much Lee's Neji's Kiba's background. We also don't know much about their parent. Wait! We havent been told even about naruto's parents ( Only dad ), we have only been given a hint that he has a mother whos name was Kushina.
And you have to agree with me here, that Naruto is much and more important than Sakura. Plus, what is the reason of introducing Sakura's background? As we have seen so far, Kishimoto Masashi only describes a story of a Character when
a) there is something going to happen with him
b) this is important for the continuation of the manga
c) there is something special about characters past
Sakura's background doesnt affect those 3 point. She most likely had jsut a normal life, plus, in the first part, we have seen her playing with Ino and how did Ino save her from being called a wide forehead girl, or something like that
What is more do you need? I wouldn't like Kishi to waste 6 to 10 manga pages on Sakura's story
Moreover, it wont be as interesting. She is usual.