No doubt the game has been downgraded in a lot of ways but that's kind of the standard for most games shown at e3 and is nothing new, see pretty much all ubis games especially division 1, witcher 3, cp 2077 but they all still ended up being very good games (debatable some of those games especially cp2077 at release obviously, but majority would agree I reckon). It's why no one should ever believe the footage they see at these shows, of course it's not on as it is false advertising big time but sadly it won't change, just the way development works and isn't limited to just the game industry.
Don't disagree on the other points but as mentioned, I can't really think of many, if any open world games that match the game world design/lived in feel except for likes of assassins creed games, cp2077, fallout 4, rdr 2. IMO, it is an improvement to the first game on the whole (visuals/atmosphere are far better too)
Given the support dl 1 has received, I fully expect there to be a lot of content and updates for this going forward.