Oh, I don't know - I quite like the balcony scene, simply because I think it shows more vulnerable and conflicted side of Solas.
The Fade dream sequence is likely what you say it is - him being fascinated and delighted with the fact that someone else can visit him in the Fade and that the Herald entertains the idea that the world is more complex, but at that point in the story/playthrough Inquisitor is probably not much more for him than a curiosity. While he opens up a little, he's still very much guarded and careful, plus we can still lose a lot of approval with him and never trigger the balcony scene.
In the balcony scene however Solas comes to acceptance that Inquisitor is actually The Real Deal - which is probably not an easy thing for him.
What I mean is... he has his plans or his mission and I don't think anyone doubts that they require doing something either controversial or downright awful - and even if he's conflicted about it, he seems determined to go through with it. Psychologically it would mean that he'd have to keep convincing himself that either it's worth it or the world or people he's going to sacrifice is all kinds of bad - and people he encounters in Inquisition simply prove him wrong. Aside from Inquisitor, he has a very good opinion about Cassandra (how could he not? Cass is AWESOME), seems to like Varric and many other companions and seems to be genuinely sympathetic to plea of many people met along the way.
So on one side, I get a feeling that he really wants to justify his actions and keep believing all kind of bad things about the world (though it's not like the world doesn't give him ample reasons to think that way, nor it's like he puts ancient elves/gods on pedestal, judging from available dialogue and banter) - but on the other, he sometimes seems almost happy and relieved to find out that it's not all that bad and perhaps worth fighting for. I also think that what Blackwall said about Cullen at some point fits hims as well (I paraphrase): "He's seen the best and the worst what world has to offer - and he still struggles with where it leaves him."
Personally, I just love it. Shows just how complex and dynamic the character is and promises some REALLY interesting stuff to happen in the future.