I guess it could work for movement itself. But you realize that targeting in any way needs the mouse in this game right?
I don't think that this is an issue, i mean direct-controls have to work for Gamepad as well. For certain Attacks/Spells there would be still an trageting system, but Movement-Itself, even in Combat, should be possible.
Also WSAD for Camera isn't an good Argument, due you can give the Camera-Controls also on the Arrows, and the Controlls are Changeable already as well so for People like us, who use WSAD for Camera, there shouldn't be an problem.
#Topic:
Good suggestion, i think it may be possible once Gamepad-Controlls are included. However i'm not sure if i personally would want to use that. I acutally dislike to play isometic Games like Divinity (or also Hack'N'Slay ala Diablo) with direct Controls on Mouse & Keyboard and would prefer to play Gamepad to begin with, if i want direct controlls.
However as an Option, "IF" it is possibly and easy to achieve(thats up to larian to decide that) - why not? I don't see to argue against more Control-Options...
