Yen: "In two places - Velen and Novigrad. The trail in Velen is most promising. You should make that first stop. Ask for a merchant named Hendrik at the Inn of the Crossroads. One of the emperor's agents, he should get in touch with you."
Geralt: "That's it? No passwords, no secret handshakes?"
Yen: "None. Sorry to spoil your fun, your boyhood fantasies about the crafts of the trade. - All we have in Novigrad are unconfirmed reports, rumors. But there you will have the help of our...[pause]... there will perhaps be somebody who might agree to help us, our [really ironic] mutual acquantaince. - Triss Merigold. Apparently she's got a cozy flat on the main square. But I'm pretty sure you already know that.."
(At this occasion I'd bring up the amnesia issue and the respective dialogue between Geralt and Yen. It's one of the core consequences of TW2 that should be treated properly by giving it central space early on. Not only because it's something that is of great importance to Geralt himself (and this is supposed to be "Geralt's personal story") but because there is missing context for people who don't know the books or even the previous games that needs proper explanation. The game tackles that later during this dialogue with a short optional choice dialogue but that's imo two little context, especially since the game gives you no chance to express your feelings for Triss - if you have some - early on - which is a core and valid criticism of many Triss fans, especially since CDPR decided that Geralt and Triss had to split up at the beginning of TW3 no matter what. That's completely consistent with the plot but that doesn't mean that by giving the player a small choice here wouldn't improve the situation for everyone, giving back agency. So I suggest a choice here that can't be avoided. It should cover everyone who is is attracted to Yennefer (like bookf fans), everyone who is attracted to Triss (like fans of TW2, who want to continue their romance with Triss in a consistent, properly explained way) and everyone who has no preference at all (like perhaps complete newcomers). It's not like this choice is absolutely necessary to bring the plot forward, not at all. But it's a great opportunity to give the players agency and the feeling that their choices and their preferences in the games are properly acknowledged and respected. It's a typcial "Mass Effect" choice situation with no long term differing consequences (only short term like the kiss). It more of a "feeling" choice, for the pure sake of the moment - and to further explore one's one path in the game. At the same time I cut the kiss with Yen in all situations in which you don't clearly stand to her so early on. Everybody can of course still decide for Triss or Yen later on - or both or none of them with the respective consequences)
Geralt: "I'm sure she will be delighted to see me. What about you? What will you do?"
Yen: "I shall sail for Skellige. There was a magic explosion recently, blew half of the forest down. I believe this had something to do with Ciri. I'll be in Kaer Trolde. Join me there once you've learnt something."
Geralt: "Yen...I'd lost my memory...I know you're hurt but...about Triss...she helped me to find the kingslayer and she helped me to finally regain my memory."
Yen: "So that's your excuse? I've heard you and Triss made a great couple."
(choice A -> It was failure and I'm sorry about it.)
Geralt: "If I hadn't lost my memory nothing would have ever happened. As soon as I've recovered by memory I left Triss and tried to find you...you know what I feel for you."
Yen: [calm] "Do you? That you'd forget about me that quickly...maybe it was that genie alone, after all..."
Geralt: "Yen...I..."
[Yennefer kisses him.]
Yen: "I know, Geralt. But we don't have time for that now. I'll sail to Skellige. There was a magic explosion recently, blew half of the forest down. I believe this had something to do with Ciri. I'll be in Kaer Trolde. Join me there once you've learnt something. I will wait for you there."
(choice A path ends)
(choice B -> I still have feelings for Triss.)
Geralt: "When Triss helped me we came closer, really close to be honest...it's complicated...Once I found out about you...and Ciri...I had to split up with Triss, thinking it all over. But now I feel bad about it..."
Yen: [really angry] "Oh, you feel bad. How do you think I felt when I heard about you two? I should turn you into a frog or something..."
Geralt: "I didn't...want to hurt you, Yen. It's just that I have feelings for both of you."
Yen [sad, calmed down]: [pause] "You once told me that I had to decide between you...and Istredd. You remember? And I did. Now I expect the same from you. [pause] I'll sail to Skellige. There was a magic explosion recently, blew half of the forest down. I believe this had something to do with Ciri. I'll be in Kaer Trolde. Join me there once you've learnt something. And I expect you've made your decision up until then."
(choice B path ends)
(choice C -> ...silence...)
Geralt: "..."
Yen: [angry] "So you don't have to say anything at all about that? [pause, calmed down] Ah, let's drop it, all right? "It's not what you think" or "it helped me understand how much I love you". I don't wish to hear it, any of it, anyway. [pause] I'll sail to Skellige. There was a magic explosion recently, blew half of the forest down. I believe this had something to do with Ciri. I'll be in Kaer Trolde. Join me there once you've learnt something"
(choice C path ends)
(linear plot continues with mandatory choice -> Time to get going)
-->(optional choice "Before we part..." is completely cut but almost all of its parts are implemented in the choice situation above)