Sakura really was retconed completely. I mean, in part two, even when she was furious at people, she never used her enhanced strength to express how mad she was.( remember when Said was running his mouth?)
Yet here she's so pissed, that she punches the ground and destroys her house.
Next, Sakura does not show she's able to handle Salad, yet in both part one and two, she was shown to be good with kids.( when she gave candy to that poor boy in Wave and when she not only healed that little girl during the pain invasion, but she comforted her after seeing how scared she was.)
But now, she can't even deal with Salad and her questions.
And the whole fainting thing? Maybe she caught an illness after sleeping with Sasuke. God knows how inbred the Uchiha were, so for her to be exposed to that, she might have been infected by Uchiha plague or something.