We cannot change the past, and the future is often murky and unclear. But the present is ours to decide. That is why it is called the present.
Harry taking Diana, though she's a couple of years younger than him, seriously, treating her as an equal and simply being nice to her despite the fact he barely knows her. Sif points out how rare that is.
Several times, when Thor makes comments about Lily, whether he thinks them or says them aloud, he gets a whispery half-heard answer that is clearly Lily, in some shape or form.
Pretty much every face to face interaction between Harry and Wanda.
Professor Xavier gives Harry something to explain why he has not met his cousin Jean yet: a letter from future Harry, who proceeds to raise present Harry's spirits by telling him that things will get better, to stop fearing his powers and instead embrace them, and also gives him small messages for the Avengers, hinting at good things for (at least most of) them.
Betsy's teaching of Harry and counselling of Ginny, mixing kindness and compassion with a wicked (but not cruel) wit.
Wanda cuddling Harry in chapter 72 and Thor comforting him.
Daddy's here, Harry. Daddy's here.
Carol's 'not your fault' speech in chapter 72 and, immediately afterwards, hugging Harry.
President Ellis' gentle handling of the Winter Soldier. That is a good man, as well as a great one.
Before he sends them off in what is a quite dangerous mission, Doctor Strange has quite a few kind words for Harry, Carol, Diana, Jean-Paul and Uhtred, telling Jean-Paul not to be afraid of power and giving Harry several pointers on how to deal with his current anger and his growing powers.
When Carol heard about what happened in Chapter 74, she immediately called up Jean-Paul and had him run them both over to Harry's side to support him.
In chapter 75, also an Awesome Moment, she went nose to nose with Sif simply to ensure that he wouldn't be alone. Fandral remarks, impressed, that that's the longest he's seen anyone stare down Sif in centuries. Subverted somewhat in that Sif had actually been about to extend the offer of travelling to Asgard to Carol and any other of Harry's friends who wished to come on the grounds that they'd be under threat too, but still.
Upon seeing Harry on TV, which breaks the telepathic block on her memories of him, Jean immediately rushes to try and find him, with Scott right away going along to help her.
Several examples in chapter 77:
Stephen Strange doing his best to rid the Winter Soldier of his brainwashing and giving Jason Todd (right hand to Baron Zemo, and now beset by doubts over what to do) the chance to redeem himself by allowing him to handle the Sword of Faith, which he takes.
Thor and Harry bonding after the former's almost death. Of course, in this case, it means tag-teaming to destroy demons and dragons by droves.
Diana jumping into her father's (Hercules) arms, who she has not seen in years, and the latter loudly praising her abilities.
Harry and Thor save a British Army detachment from being overrun by demons, and its captain thanks them, saying that Harry is a boy to be proud of, which Thor agrees with.
Thor teasing Harry over his attraction to Carol.
Tony, after asking JARVIS to send Pepper a message to tell her he intends to have Glad-to-Be-Alive Sex with her, he adds to tell her that he loves her. JARVIS gently points out that she already knows that, but Tony insists.
Tony praises JARVIS when he forces Zola to back off, and JARVIS says, basically, that he learned it from him.
Sif and Loki kissing in the middle of the battlefield, prompted by the Warriors Three, who protect them as they do so. And Volstagg encourages them not to do like after New Year and to continue their romantic relationship.
The Hogwarts staff (even Snape) risking their lives to save a number of innocents from HYDRA, protecting them from a quinjet attack, while Hagrid covers the innocents with his body.
Hagrid's faith that Dumbledore will see the group through, and Dumbledore's pride of Hagrid, thinking that there is no doubt Hagrid is one of the finest products of Gryffindor House.
Steve, Sanya, Michael Carpenter and Dane Whitman fighting to protect a group of people that were not able to escape in time, not letting a single demon past them.
Strange's 'faith can be something someone has in you' speech to Jason Todd while offering him the temporary use of Fidelacchius.
Arthur Weasley's ghost forgiving the Winter Soldier for killing him, noting that it was a Mercy Kill and that the Winter Soldier did what he could to prevent HYDRA's victory, saving as many people as he killed (perhaps more), and finally pushing him to do something to begin the path to redemption.
Young Bobby Drake fighting demons, because he doesn't want anyone to get hurt protecting him like Harry and his friends did in the Rocky Mountains.
Nick Fury being uncharacteristically polite to the Flamels, thanking them for their hard work. As he remarks, it is their due.
In chapter 78, the event no one (save for Strange) expected: Lily Evans Potter, vessel for the Phoenix, fully manifests in reality. She soothes Wanda, reveals that she was the one whispering to Thor and Harry whenever they thought of her, tells Thor that, as much as she would love to be completely back, she does not hold his relationship with Jane against him, convinces Harry to kick Chthon out while telling him how much she loves him, gives Nick Fury a hug and stays for the post-battle party.
Earlier, Jane and Darcy accidentally teleport right into the middle of the battle, not to far from Thor. He and Jane immediately embrace.