The thing is, they want the game to react to different characters in different ways, and if the player can only do a given interaction with their main character, then that severely limits how much content they see per playthrough. Replayability is great, but the percentage of players who will play through any game more than once is tiny. And with five races and hopefully at least two origin stories per race, there's still room for lots of replayability even if you can see the unique stuff for each of your four party characters.
It's like: "Hey gamers, we wrote all those different racial and origin dialogue options, now READ THEM." But actually the different racial and origin dialogues should offer options for the player. They should make each playthrough unique and each character unique. They shouldn't serve as an excuse for bad narrative design or even stretching out content.
I don't see how suliminally forcing the player to read each dialogue four times is helping the game. Again, this is a concept that sounds great on paper. But it doesn't play great. It becomes tiresome very, very soon. After 12 hours with the EA version this is the thing that bogs me the most, by a very big margin.
