I was wondering if you guys think the kiss at Kaer Morhen could be redone by swapping out Yen with Triss. I rewatched the cutscene and it wouldn't require any new dialogue it would however require the individual scenes to be swapped around a bit. (If you don't remember the scene you should watch it again because this next bit is hard to explain and slightly complicated)
After Ciri greets Vesemir have the Triss "Little sis" hug scene
Then have Triss walk to Geralts side (like Yen does) then have Ciri say her "Nothing has changed" line
As soon as she finishes that line, have Geralt say "What", looking at Triss then commence the kiss although this time its between Triss and Geralt.
Ciri can give a slight WTF expression, which is interrupted by Yen screaming "Ciri!"
Now Yen can arrive to greet Ciri, using the same dialogue but just when the scene ends have Yen do the 'Triss stare' at Geralt and Triss, while she hugs Ciri
From this point on the scene can continue as normal although now Triss is at Geralt's side and Yen is at Ciri's side.
This makes the "Damn, it’s nice to see you" line make more sense, as now Geralt is looking at Triss.
Then have the scene end with Yen's line "There will be time to talk later"
This is something I thought would be reasonably easy to create just by using the scenes and dialogue that is already in the game. I'm sure CDPR would have no trouble implementing two facial expressions (the Ciri WTF expression and the Yen stare). I think this would be better than just cutting the kiss scene altogether for the Triss romance.