I think the trailer is implying that Ciri will also be able to use regular magic to some degree. When the monster pins her to the wall, she draws magic from the water—something Yen taught her in the books.They had an opportunity to do a Sorceress/Witcher hybrid but I think they are just going to do just Witcher stuffs. I think if you relied more on your magic and your limitations of not being a mutate it would open up new challenges. If anything I hope they let you keep the Blink dodge.