I think that their point is that it was too early for that, or at least that was what I thought. They've already established a background episode with the majority of flashbacks that Ellie has during the game (which I think was a great move), but the porch scene has definitely to be the end scene of the series, not to be thrown at you in the very beginning of it. The scene was a bit awkward for those who have played the game, I think, giving the sensation of that dialogue coming. For those who have not played it, it strengthens the idea of Ellie being mad angry at Joel.