The difference between that time and now being that all this while she still had all those bottled up feelings for Sasuke and didnt get the opportunity to let them out at him.This time she did and got murdered in genjutsu.I bet she wont feel the same about Sasuke after waking up
All previous murders were attempts.This one was done in her mind to simulate death so its much more dangerous and horrifiying considering genjutsu leaves psychological marks on the victim and they never fully recover from it
Besides the manga was not ending at that time so how could she come to a realization.That will happen at the end of the manga which we are now reaching.This Sasuke issue needed to be tackled head on and I am glad Kishi took this route because finally Sakura will realiza who she truly loves
Remember the databook itself says that she loves Sasuke but she doesnt know exactly what her feelings for Naruto are.She is going to find the answer now.
.....I'm going to say this again.....That databook was made several years ago (i'm pretty sure it was before the Hidan & Kakuzu arc) Kishi's comment about Sakura's confession was much more recent and took place after the arc describing her actual feelings which means its word of god
second Sakura has had several opportunities to face facts that Sasuke is an kitten and each time afterwords she still was thinking about him as more relationship material wheras Naruto wasn't even brought up (ofcourse Kishi did this so he wouldn't make NS obvious but this ofcourse doesn't change the fact that we see what Sakura is really feeling)