I seriously hope that one shot is not all Sakura gets to do. It was cool seeing her release the Byakugou and press through her fear to take the initiative against Madara, but rushing in the way she did was reckless so I can see why that would bother some people.
I don't think Sakura was surprised that Sasuke doesn't appear to care about her as much as she was saddened by it. She cares about Sasuke, even if she's no longer in love with him, and seeing the evidence of his apathy towards her even while they are fighting as comrades hurts her deeply. Honestly, why are people actually upset at her for that? I found her reaction understandable, given the circumstances. Sasuke may not be worth her tears, but Sakura is a caring and forgiving person and she's always going to care about Sasuke whether he deserves it or not.
I wish Naruto would call Sasuke out on the fact that he would have sliced right through Sakura had Naruto not pulled her out of the way, though he probably won't. They are "great friends" after all. Naruto's leniency toward Sasuke is really difficult to stomach.
He's not even willing to acknowledge that Sasuke doesn't care; at least Sakura can see that much.
I'm curious to see how Kishimoto will handle the Infinite Tsukuyomi. It could be interesting but hopefully it won't become something that drags on too long.