KetobaK: If you read the books, Ciri is canonically bisexual and if you played The Witcher 3 would have notice that Ciri is an awesome character. The series is in good hands and probably will be much deeper than The Witcher 3, the elder blood lore is very complex, you have a lot to expand. Trust my friend.
Ciri arguably suffers from stockholm syndrome in that relationship although it doesnt change that she is bisexual. Given Ciri doesnt use her warping powers which she did freely in W3 once she got control, she either lost them in the interim (either from taking the poisons to become a witcher and use potions or after the prophecy was addressed) or she is restricted because of the backlash from using them (causes a time paradox or something). She was in trouble in that fight and not using her powers at that point would be silly.
But to say this will be much deeper than W3 is silly when we know nothing about it, not even the main conflict. "Elder blood lore" would basically be a recreation of royalty conflict and chosen one tropes that should have technically ended with W3 and the "frost" brought by the Wild Hunt. To say "actually that wasnt the threat that was going to end the world, this one is" is kind of cheap storytelling, especially when its also implied in the books that the threat was a more global event like climate change rather than a single event.
Breja: I'm kinda disappointed. I really hoped this would be disconnected from Geralt & Ciri. Not because she's a woman, but simply because that story concluded so well, I wanted them to let it be. I mean, it already concluded perfectly well in the books, the games pushed it further already and miraculously got away with it, but now was the time to really let it rest.
I hoped they'd set the new game hundreds of years before, early in the history of the Witchers, when there were way more of them, the political situation was all different, and the world was just crawling with monsters that were gone by Geralt's time. Would make it way more interesting to shake up the setting.
This is honesty what I wanted as well. Either set it very early to when the witchers were first created (or possibly even before and we are the first experimental witchers) or when Vesemir was young and around the witchers' peak in terms of respect and possibly arsenel if we wanted familiar characters. World would be very different and would be a world with alot of monsters as opposed to this period where monsters are becoming much more scarce (hence why witchers are no longer necessary). Unless there was another conjunction of the spheres, monsters should be a dying breed that should be stamped out by the rising Nilfgaardian empire. Also basically canonizes Ciri becomes a witcher as the "true" ending for witcher 3.