Yeah this +1.
It would be good for and interesting for players unfamilar with the lore of the forgotten realms. History like the fall of the Tieflings to the 9 hells and the netherese etc. would be an interesting read for many player and personally love that shit as it quite literally world building.
I mean Larian could just copy most of the bestiary from the player handbook wouldn't be too much trouble I wouldn't think.
