Tony, it's interesting you find WoT derivative. The first WoT book was released in 1990, GoT 1996, Witcher 1992. Obviously anything after LoTR follows in its footsteps...
I've never watched WoT, only a bit of GoT, nor Witcher, and I'm unlikely to, but what Sanderson did to the end of the WoT book series is criminal. It's too bad he couldn't do better given the Cliff's notes from Robert Jordan