A very touching chapter, but nothing that I wasn't expecting, even the ending.
I liked the ObiRin moment, it's just a pity it will never be given a full resolution with Obito confessing and maybe Rin seeing him in a romantic light.
I guess we're meant to make the assumption that it will be resolved in the next world now that they're alone together. We already have Minato supporting Obito's feelings for Rin by telling him not to give up, which leaves the implication that Obito could've indeed gotten Rin's affection if he tried, which he'll probably now do based on his words about being alone with her without Kakashi interfering.
Well, maybe when Minato returns to the afterlife Kushina will be there to greet him along with Obito and Rin who could be shown still holding hands. That could easily be the canon confirmation we wanted.
That would be nice who knows maybe Minato will reference 504 again and he'll tell Kushina that Naruto found someone just like her.