I might not make any progress here, but the best and rational solution seems to give the player the choice to choose between those two or none, but that's where the whole dilemma begins for me.
Triss got an headstart of two games and is a kind and good character so far, if you ignore those subtly hints of dishonesty, while on the other hand we have Yennefer, which has a dubious background from the books and was absent for two games for whatever reason, maybe she is even cooperating with Emhyr?!
i couldn't even blame one for not choosing Triss in the first place, because why should you choose a woman you have never encounter before?
And now they are even giving this one advantage Yennefer got, the bound fates of Yen and Geralt, also to Triss by mentioning a "bond" she has with Geralt.
How can they make Yennefer even appealing anymore, if they implement such a strong character like Triss? It's like they don't want you to choose Yennefer at all