BG3 Ranger is different from 5E Ranger. They had to change it, otherwise no one would play it.
But, BG3 is being developed in partnership with WotC! This is not a custom homebrew class! So, how it different? Because WotC knows 5E Ranger is a failed design, and they want this product to be successful. It is obvious that they intend to redesign It for 6E, even though it's taking forever to get a new edition out.
I would like to hear discussion from Crawford about why these changes were made, and their intention to give players better reasons to plyay Ranger in 6E.
I don't think 6e is remotely close to coming out...would be weird to treat this as a preview of updates to Ranger or whatever.