Parmandur
Book-Friend, he/him
Given that they seem to have struck a nice content balance with setting books recently, I'd be perfectly fine with that. I'd love to see 5e Greyhawk and Planescape done in such a manner (although giving more than a small paragraph for some planar layers might be hard unless there's an expanded page count). I really hope that SCAG and hardcover adventure placement doesn't preclude the Forgotten Realms from getting the same treatment though. Maybe they'll just lightly cover the Sword Coast and cover the rest of the setting in greater detail, which will allow the rest of the setting to get the "evergreen" treatment while letting the Sword Coast be more changeable...
The Forgotten Realms is getting a small region focus every year: a broader FRCS doesn't seem likely, but they will cover a lot of ground by the time they are done with 5E, I think.