There's just no scenario where WASD scrolling would give you a noticeable advantage over traditional RTS control. A mechanically competent player is going to be minimizing minor camera adjustments already and would be far better off with four additional hotkeys than having those keys fulfill an extremely narrow and redundant function.
Agreed. Moving the camera with WSAD is a total waste of both Classic and GridKey hand positioning.
It would mean your hand is in a position that would need to move abnormally to reach the very hotkeys that speed up your gameplay.