Almost no part? May I remember you about healing Kakashi, fueling Darui's jutsu? Or those seem unimportant? Or do you forget about the rules of the medical ninjas?
The reason she was placed there is because she has to stay in the back. But it's more convenient to think that "because Sasuke is coming", right?
If it floats your boat, then, sure...
However, if it would've been because of Sasuke, then why have it earlier in the exact same time when Minato lands, thus, making Sakura witness and participate in another of his important key part of his life? Guessed you missed the other half of the manga where she learns about Naruto's pains, burdens, Jinchuuriki status, so on and so forth.
I would want to say that you truly missed the part. It was about how to NOT supress your feelings, which both Naruto and Kakashi did.
So, congrats on not reading properly, I guess.
Yes,almost no part.As a main heroine,which she is supposed to be,she stands on the background.You said it yourself.Unimportant,as any other medical ninja could have healed Kakashi,unimportant,as any other shinobi with good chakra control could fuel Darui's jutsu.So she appeared on a panel.Great.That's what you call character development,or being important to the plot?If she is a side character (which I consider her to be since chapter 3),yes,I admit, great job Sakura.But since I have a feeling you made this thread considering her as a main character my answer to you is this:Unimportant.
Ino is a medical ninja too.She put her life at risk and got in the front lines more than once.And she is a side character.I understand the 'codes' of the medical nins,but do you understand what you are reading?It's a war,that will determine the outcome of the whole ninja world.But Sakura can't fight in a battle,cause the codes tell her that she needs to stay behind and heal the wounded?News!There won't be any wounded for her to heal if Madara and Obito gets their way on this fight.
Yes,the only reason she gets more panel time is because team 7 will reunite on the battlefield and somehow,Kishi has to remind us that she is there too.There are way too many speeches on this arc,important ones that had great meanings.Sakura just repeated something that Naruto,Kakashi,Hinata and Neji already mentioned.
Minato appeared on the battlefield,where Naruto is surrounded by shinobis.His reunion with his father will be witnessed by the whole ninja world,not just Sakura.And I believe Minato is an important part for team 7,for reasons I won't explain here, since it will get way off topic.
I guess you failed to read properly.I said Sakura follows the rules and codes WITHOUT FULLY SUPPRESSING her emotions.Kakashi does that.Naruto does that.Sasuke does that,but in a wrong way.Most shinobis do that.Only Itachi didn't seem to do it (speaking for the most important characters of the manga).
Thank god there's sarcasm on this congrats,otherwise I would feel kinda offended.