EDIT: I am really, really sorry for posting this and I feel kind of bad now because I see things have gotten a little happier since I started writing this post

. But I still stand by what I say.
1) No. Hinata did NOT do what Sakura should've done. Hinata did exactly as her character entails. Hinata's character from the beginning has been about being inspired by Naruto. It makes sense that now she gets to do the inspiring. Had Sakura been there in that moment then Kishimoto would just later on give her another moment to shine. No matter which way you cut it that was NOT meant for Sakura, it was meant for Hinata.
2) 'one of his darkest moments'...But not thee darkest eh? Naruto's going to have his doubts. It's what makes him human. And in those doubts as contrast to his horrible past before he's going to have friends come up and reassure him. Plenty of other times he has had down moments other characters stepped up to the plate and brought him out of it. But now that Hinata has done it suddenly it's 'OH NO SAKURA SHOULD'VE BEEN THERE!'
3) Healing Naruto is KURAMA'S thing. And how many times has it been stated that popping a dislocated shoulder back into place isn't something that takes years of medical training to learn?
4) Yes it's for her development.
5) The ten-tails is not the final boss, Sasuke is. THe ten tails is like a boss level before the final boss. This will not be Naruto's darkest moments because Naruto has no emotional investment in the 10-tails, Madara or Obito. however he does have emotion investment in Sasuke. it stands to reason that preparing for his fight with Sasuke(because YES there will be a preparing period/maybe arc and you can expect Sakura to show up) will have more emotional turmoil and Sakura will have to be by his side
6) One of the biggest moments in the manga...in a volume dedicated for the side characters. Notice how Kakashi and Sai also got no focus since the alliance showed up.
Not to sound mean here or anything but don't you think you are making a mistake here by assuming the manga will be over in a like 5 chapters or something?
And I really don't understand you that much. I've seen you make many(like MANY) statements saying 'such and such manga did this better' and 'I don't really care about Naruto anymore' and yet here you are. I think you care more than you are willing to admit honestly. And it seems liek your new role here is to constantly(CONSTANTLY) compare Naruto to (finished) manga written by more experienced authors. Do you want him to plagiarize or something? Write the same thing we've already seen over(and over) and possibly get flak for it? And for someone who jumps on others for being close-minded you don't listen to others very well yourself...
Her medic skills are not a bad thing for her characters.
Face it Sakura was SO good at being a healer, they called for her off of the freaking battlefield despite having medics from ALL of the countries who, as you said, have no battle skills.
Think about it.
Medics solely trained to do medic work could not handle the injured people from the war.
THey HAD to call in Sakura who has multiple skills to come help them. THAT'S how great she is. THAT'S how important and crucial she is.
To make things better she's a teenager working with adults. Medics and everyone needs her just like how everyone needs Naruto to fight in the war.
She also figured out how to defeat the Zetsu. Kishimoto could've EASILY had SHikamaru figure it out or one of the generals or Shizune even. But no it was the 16-17 year old GENIUS who figured out how to stop the invasion. THAT'S amazing!
Said super strength is the result of perfect chakra control which is good for many things including medics. Becoming a medic does fit her personality if you think about her character development. Sakura wants to be helpful. And she is. Have you ever heard about someone dying under her care? Have you EVER heard about her failures as a medic?
She may be a hot tempered person but she did not train under Tsunade just to learn how to fight. She wanted to learn how to be helpful, how to use her chakra control to the best of it's ability. And you know what? She did! She is also smart enough to know when to use which skills when. I hope you don't honestly think she'll abandon someone in need just to fight because that's what it sounds like(it's a WAR meaning plenty of people are getting hurt which means her medic skills are needed.) As for the unused genjutsu potential well now she has something else she can work on for the rest of her life. Do you ever hear bad things about her combat skills either?
This is gonna be my first and only time debating this. I know that normally no one normally pays attention to me here but seriously all complaining(and complaining and complaining) and hypocrisy(dear GOD the HYPOCRISY!) and of course, attacking others for the crime of having a different opinion(yes I've been attacked before for this reason on here) has turned me off from this site. I used to be excited coming here but now...nope. I still love Naruto and NaruSaku with all my heart so yeah this place isn't fun(sorry to say).
I agree, nice to see you here again (even though I dont remember you) but I agree with you ll the way.
People keep complaining that sakura played a little role in this war and hinata is stealing all thr glory, thats just silly, hinata's character is being wrapped up, plus shes hardly even doing anything, ok lets compare the two:
Sakura:
1.She helped heal Gai before the war started.
2.She appeared in the zabuza fight and healed so many ninja in her squad.
3.She found out who the secret imposter that was going around and killing everyone was and defeated him and on top of that made zetsu acknowledged her abilities and how smart she is
plus she beat the cra* outta that zetsu 
4.She cracked the secret behind the zetsus, with shizuneh (although shizuneh was shown to have done nothing on panel)
5.And she healed kakashi and is now healing other countless shinobi with the rest of her squad.
Now lets move on to hinata:
1.she took over watching out for enemies (for god knows what reason) while neji was recovering.
almost got her a** pulverised 2.she pep talked naruto.
......thats it....THATS IT!!! AND YOU SAY HINATA GOT MORE TIME THAN SAKURA? My apologies but your just messed up.
Hinatas character has been wrapped up, and sakura is permanently in the game, since she's the heroine.
'Nuff said.