CDPR wanted to split players 'in a way that's almost 50/50' with Phantom Liberty's hardest choice, and drew on the toughest decision in Witcher 2 to do it
It's one of those rare choices in a game where there didn't feel like a "good" or "bad" option. I also didn't feel regret for my choice at any point after, but still felt conflicted about it. It's impressive they progressed the story from that point to the DLC end without making it seem like one direction was the correct one.