I think these kind of quests are the most interesting because it makes you think about how you go about them. I don't see it as "screwing up" or doing the quest "right", it's more about what you did and the reactions to your choice. It's the decisions that you have to live with that shape character. There are no right or wrong way, only what you believe is the right choice for you. Just like in real life. I would love to see more of these in the future.
The reason why I love that quest in particular is that the game I'm working on is from the grounds up built around choices like this. And that I really love the concept of not knowing if the choice you make really is that significany or not.