There are two perfect starting points for the Realms. OGB and the 3.0 FRCS. 2e was carbuncles with all the weight of canon that had already accrued in five years with novels and comics and games and sourcebooks. 4e was nuked. 5e is… a region book like The Savage Coast or Red Wizards in 1e or The Silver Marches in 3e. It’s not a campaign setting. It’s a supplement to a campaign setting that wasn’t released. Even then, if you stick to the Sword Coast you don’t need much else to make a great campaign there. So in that sense it’s complete. It just should have stuck to being SWORD COAST and not had Purple Dragon Knights for example considering they’re leagues away from the Sword Coast.