After playing it some more, I understood that they also removed bleeding effects. Previously any wound could become lethal if you didn’t have a medic.
The crates shown on the map are great, because those usually contain the best items. But on the other hand, they don’t show items that haven’t been picked up anymore, so it’s easy to lose something in the bushes.
Speaking of crates, I think they removed the need for a crowbar to open some. And also the item condition was removed, or at least I can’t see it anywhere. And because of that, you also don’t need a mechanic as much.
More inexplicably, it seems that the time outside of combat was also sped up. In the original I could pick up all items in 3 sectors and still have time until the end of the day. Here, I barely manage to loot 2 sectors.
The loot is extremely generous, though. On the 3rd day I already have Spectral Shield, which is the best vest in the game, and since Compound 17 used to upgrade it is dropped even in the original pretty early, I have one suit of the best armor in the game. And not one but 3 .357 pistols, which are the best weapon before you get to M14 and M16. Quite the power trip.