It's the same senior production team but they have become increasingly bolder as time has moved on further diverged from the source material. This has annoyed both Henry Cavill and fans who wanted them to stick closely to the source material.
I've read three of the Witcher books and played Witcher 3 and I personally don't have massive issues with the divergences in the TV series, but I understand people dislike and the general principle of buying and using an IP then ignoring the canonic lore. If you want the universe but to tell a different story, do a spin-off about Basil the Witcher and never mess with established characters.
The Witcher definitely isn't an egregious a spin that the Halo TV series was, but there are lots of stories about issues with production of season 3 and we know Liam Hemsworth is taking over the titular character for season 4. I really liked the original casting, particular Gerald and Yennifer.