Hadn't expected a question like this, but I'll give it a shot.
The way I would have written it, I would have given Naruto and Hinata the closure they deserved with Hinata confronting Naruto about her confession, knowing that she'd be turned down, but wanting and needing to hear it all the same. The rejection that followed would be honest and considerate of her feelings and would only serve to empower Hinata by having her move on. Her time watching and admiring Naruto wouldn't have been wasted, instead it would have inspired her to pursue new goals and ambitions with the same courage and tenacity. She would have grown and matured differently and eventually become far more assertive, taking over the Hyūga clan from her father and abolishing the use of cursed seals on branch members to honour Neji - she would do this on her own without having to rely on Naruto, though she would have the support of her sister and of course the branch family. At her core, Hinata would always remain the kind hearted person, however in her later years no one would ever think to doubt her strength. If I would have to write her settling down with anyone, it'd probably be Kiba or Shino, but I don't think it's important to Hinata as a character who she ends up with. I think her character has always been about finding one's inner strength, and I think she would've made a badass Hyūga matriarch that changed her clan for the better.
As for Sasuke, I'm not sure I would have done it so much differently aside from obviously not pairing him up with Sakura, and have him actually apologise profusely to the ones he hurt the most (Team 7 and Karin namely). I would like to think Sasuke would want to go wander the earth in seek of personal enlightenment and redemption whilst making amends by doing good wherever and whenever he could. I would want him to truly find himself in his journeys, not just as an Uchiha or a shinobi, but as an individual. I think it would've been cool to see him run into Kabuto at some point and find that he took over the orphanage that had taken him in and the two would have a chat about Itachi and themselves and how they changed. I would like to think he would eventually return to Konoha, mellowed out and at peace. He would settle down with Karin, thus in way making himself and Naruto family, and I would like to think Sasuke would retire from shinobi life and focus on rebuilding the Uchiha, with the intention of raising a family first and clan second, with the emphasis not on their perceived superiority but their capacity for love. Sasuke would still continue to hone his skills even as a civilian, with the mutual understanding with Naruto that if he were to ever lose his way that Sasuke would be the one to stop him, like the guardian Hashirama had wanted Madara to be. He and Naruto would remain friends until their dying days and the feud of the two brothers would well and truly end with them.
That's probably how I would have done it.
