Oh, this was absolutely lovely. Highlighting the differences between two universes and between all these people who are supposed to be the same person, you gave them all their individual sympathies and this is what I liked. MCU Steve always came off to me as a kind of more innocent and sweet version of his original counterpart, but I think Tonys haven't chatted with each other enough if 616 Tony still thinks he's an asshole.
That little bit about mending bonds at the end just made my heart weep for Tony, because in comics he's been so very lonely and unhappy for a very long time and he deserves this to happen to him. It was a wonderful piece of writing, dear author.