Didn't mind personally not having an option of where to go after the game (Kovir).
It's not like you're going to play the game there (as it's a post-ending story detail).
It's open ended as to what you end up doing (as financial means are no longer a concern), so the ending isn't something where Geralt is forced into an ending lifestyle you don't like.
Wouldn't mind more dialog, some banter, even if it ends up with Triss telling you "Run from me now, witcher, and I'll bring you through a portal myself".
Even a non-interactive cutscene in their house in Kovir before the end credits would be interesting, something to preface the final narrated end-picture...
[Geralt sitting shirtless on their bed, Triss beside him stitching his arm. Few candles lit, evening sun casting light shafts across corner of room]
Triss: Kayran, huh?
Geralt: ...Yes....small one, of course.
Triss: Because baby kayran are *just* adorable...could have brought it home, we don't have a pet-
Geralt: There is no such thing as-OW!
[pulling stitch tight, Triss leans in to kiss him on the neck]
Triss: [whispering in his ear] Shush...it had it's turn before, now I get mine [giggles, nuzzling his neck, their eyes lock]
[Loud, incessant banging at door downstairs]
Dandelion: Ms. Merigooollld! I know you're in there kidnapping my friend!
Geralt: ...[exasperated]...Dandelion!...
Triss: And we'd have it no other way.
[She kisses him deeply, getting up pulling him along, scene fades]
Or whatever a writer could make that wraps up their story, is intimate, passionate, yet containing that sense of humor that always follows their scenes.