I think Larian mentioned somewhere that your dream person is an actual person who will come into play later in the game, but I don't think the dream person and the absolute are one and the same. Are there any abstract gods in FR?
No idea. I doubt diving into auxillary FR lore will help us understand it anyway, the story has to make sense in of itself and right now it just kind of doesn't.
It's true in theory but I feel like even bg1-2 didn't do a very good job in that department. The worst game in that regard was planescape torment actually. Half the time I had no idea where the hell am I and what the hell is going on. And no, the fact that the world is full of lore books that potentially explain everything does not qualify as good world building. Mass effect, dragon age, the Witcher, all of these games are good examples of games that thought you enough about the world through the story itself.
