Actually I had said that LOT is a future of the Amber Timeline, and whether or not it's the BlueVerse or Redverse is yet to be determined....it could be assumed it's the BlueVerse since it's our Blueverse Characters...but we have no idea if maybe the universes are merged somehow in season 5, or if the Redverse is destroyed, or if The Observers take over both? Not sure yet.
But as of the end of Brave New World, Yes I'm convinced that LOT is the future of The Amber Timeline.
I agree with most of what you said. The rest I guess we gotta wait to see.