Watch the first 5 episodes so far. Here are my thoughts.
1. I didn't realize there was a timeline difference until episode 4, when Geralt is at the banquet with Ciri's grandmother, father (hedgehog face), and mother. This made sense, to me at least, because the choices of Yennefer, Geralt, and the other characters introduced in their story arcs (i.e. Queen Calanthe of Cintra) provide a foundation / reason to why/how the "The Witcher" story leads off. For instance, in episode 1, why is the kingdom of Nilfgaard attacking Cintra and how it has come to power.
2. I like the cause and effect the show demonstrates. For example, when Queen Calanthe of Cintra, disrespects the price of Nilfgaard for his proposal to the princess (Ciri's mom).
3. I like Yennefer's character development so far. She came from literally nothing and is not a powerful mage. In episode 5, with the jinn, we learn that she wishes for everything, due to her having nothing, when she was growing up. We see the lengths/risks she will go to get them.
4. Everyone says that Witcher's have no human emotion, due to him being a mutant. However with Geralt, and observing him in his adventure's that's not entirely true. His experiences being judge as a mutant, have made not judge others by how they look. How he cares for this friend, Jaskier the bard, even though pretends that he doesn't care about him. These are a couple examples of Geralt showing human emotion.
5. Ciri, while has had some character development, it has been minimal in my opinion. I understand that she has been sheltered her whole life, and when she's on the run, we see her learning how the real world really is. For instance we see her learning through the elf boy, and the other Cintra nobility, how other people viewed her grandmother. We see Ciri watch Cintra noble women being stabbed to death by the dwarf servant, whom she abused.
Perhaps the reason why Ciri has had little character development is because she's a teenage princess who was sheltered her whole life up till this point. There were few life experiences which would force her to change as a person. Now being on the run, needing the help of others, and seeing the world for what it truly is, will bring about character development. Perhaps more so in season two.