I mostly feel it's way too early in the storyline. It should take longer to form a relationship. I think they got it [i]pretty[/] good in Dragon Age: Inquisition. It took time and felt reasonably natural, and the storyline with some of the characters rather funny.
I'm not saying that BG3 needs that amount of evolving focus on inter-personal relationship building, but it does feel like the romance comes a tad early in the game.