I agree with this. I mean they could support polygamy after all the weird stuff they put in.The way they handled the Triss/Yennefer relationship.
It's too clear they favored Triss, if not because they forced her on you in the first two games, then because they thrust Triss and the deciding choice on you before you even get to say more than 5 sentences with Yen. They didn't give anyone who didn't read the books a chance to even get to know her before the decision was sprung on them. There wasn't enough time with Yen in the game.
Also, I find that after I have completed the story a little disappointing, I feel little attachment/motivation to complete the quests (and contracts) I haven't done as there is no real sense of interaction with any of the characters. Unlike, when you interact with all the main characters during the main story. To expand the game world kind of feels empty without these characters and their interactions in it.
And I'm sure there will be (or is) a mod for this but it will kind of be nice to do whatever Geralt does at the end of the story (i.e. what the ending says) instead of just being able to do missions and contracts.