I can get it for free and still won't be downloading it. I think they could have gotten more juice out of it, look at what was achieved with Zelda.
Uh. Sounds like you want them to change the art style. From a technical standpoint Witcher 3 is leagues ahead of BOTW.
Predictions (Made July 2019)
LTD: PS4 - 130m, Switch - 110m, XBO - 52m 2019 : PS4 - 15m, Switch - 18.8m, XBO - 4.8m 2020: Switch - 22m (Peak Year)