IW's ending gave me such a Leftovers vibe, that I was hoping EG would follow through on a couple of narrative elements:
1) That time would pass since the snap. So, not only was it 3 weeks later at the outset, but then it goes to 5 years later. I was like, "Yes!" when I saw that on screen. I really wanted there to be stakes to the snap. Fixing it all a couple of weeks later doesn't give it the impact a time jump would have. And then we get to see how it affected the world. The stuff with Scott Lang walking around confused, seeing the kid ride by on the bike, the kid looks back after Scott asked him what was going on, the kid just has this look on his face and then keeps going, Scott going to the memorial looking for his daughter's name, then seeing his daughter who aged... all really well done and helped further ground the consequences of the snap, which was important to me since this was something that was brewing for years. I'm glad they went more grounded for this part of the movie rather than for humor. Paul Rudd was great here.
2) That the time travel (which I expected would be part of the story) didn't undo everything, that people would still be left with the trauma of what happened. And I'm glad they didn't take the easy way out. Those who remained, even after everyone came back, they still will remember the 5 years; those who were brought back, they will have to adjust to a world and loved one's who had to move on. So I am glad they didn't just take the easy way out here. Once I saw that Tony had a daughter, I figured/hoped that this would further put this idea into play. I do wish, though, that we got to see more of the world's reaction to everyone coming back. If you show us the world in disarray, then show us some bits of the world rejoicing/in shock as people come back. It is, after all, the point of why the Avengers did all that they did. It's a gripe I have with a lot of movies that forget to show the result of the success.
3) Going with The Leftover's vibe, I was hoping Clint's whole family would be gone, not just some of them, but all of them. It would both show what he's gone through, but also more of the consequences that those who weren't even in IW were affected around the world as it happened. That they started with this scene was great, imo.