Arguably the game’s biggest decision didn’t even exist until late in development.
Triss or Yennefer? It’s a debate that fans still get involved in over The Witcher 3: Wild Hunt. One is Geralt’s former lover from the books, and the sorceress he is destined to spend his life with. The other is the lady you’ve spent the games with, growing to love over time. It causes a real split decision at the end of The Witcher 3, but apparently this aspect of romance almost didn’t exist.