There are a few edits out there that combine Infinity War and Endgame, but Macmilln's version is the best version. Fantastic editing throughout and smart choices on what to cut to streamline the movie. Typical Marvel humor is still retained, but many jokes and one liners are trimmed away. A few scenes cut I think would have been better off kept, like the support group scene, but the movie doesn't necessarily need them. Nothing integral was cut. I am so happy that you fixed the out of place girl power scene with spiderman at the end.
So the editing is top notch, but after watching, my personal opinion is that the movies are better off as two separate movies. The impact at the end of Infinity War is lessened when the story immediately continues. And since the movie is still over 4 hours I ended up watching it in two sittings anyways.