I think in the original screenplay Triss wasn't even main romance for Geralt anymore. They changed it later.
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Another older interview with Tomaszkiewicz brothers
http://www.ign.com/articles/2013/03/27/the-witcher-3-wild-hunt-is-the-next-step-for-rpgs
Mateusz Tomaszkiewicz (Lead Game designer of TW3):
“Geralt has changed his priorities,” says Mateusz. “He has regained his memory,
so he remembers that he had a family once, he wants to find his
long lost love – Yennefer, the sorceress.
He doesn’t care about politics any more – even less than in previous games. There will be moments where Geralt will get involved in [political] things, but this time we have divided the plotlines of The Witcher 3 into a few categories. The first category is the basic main storyline of the character,
of Geralt – looking for his Yennefer, amongst much else. This is the plot that is very personal to Geralt, and this is the main driving force for the entire game.