Well its about time I got around to writing an review on this. I listened to all of the songs in the orchestral theme and came up with my own noobish list of the top 32 after several days of re-listening (this was before the official top 8 were even announced). When I first started I thought your song was around 7th place but after much re-listening and comparison your song ended up in 3rd on my list of the 32 best of those 80 songs... So that is to say Sanctuary is a song that grows on a person as they listen to it. I think the reason it grows on you is because the melody of the song is a little bit overwhelming and scattered because of the vast amount of patterns... at first you cannot grasp the voice of the song and thus it doesn't sound sound quite right. When when you get to know the melody you start to enjoy the song more and understand that complicated melody. The complication is something I enjoy because the song does not become tedious to listen to after multiple listens. There a part of this song that I can only describe as desert-like and it sticks out a little too much from the lusher mountain-like theme of the song however this difference in melody is one of the major things that grows on you so I cannot say its a bad thing rather a difference and perhaps it help tell the story better. Sorry if that doesn't make sense. My judging was mostly based on individual scores in the following categories: Intensity, Emotional Change, Consistency, Fit, Story, and Feel. The categories that correspond best with the official judging were Story and Emotional Change (Indecently, NickPerrin's Windswept got the 11/10 for emotional change and 10/10 for story also 2nd place in my list, one place above yours). Feel and intensity are the two top stats for making a song stand out to casual listeners. While Fit and Consistency are more likely to be areas where judges knock a song off for a negative reasoning.
In each category only 1 of the 80 songs can get an 11. Sanctuary received an 11 in the feel category meaning your song had the most feeling of the 80. I'm sure you can guess this from my earlier comments but the song did poorest in the consistency category getting a 7/10 7 is equivalent to a "strong attempt" (5/10 is supposed to be "average" 10/10 is "pretty much perfect") I speculate your song was knocked out of the official judging going from top 16 to top 8 via negative reasoning which is something I prefer avoid doing yet it is unavoidable and often necessary in large competitions.
So a quick summary comment your song does well with the average dude but not as well represented with official judges.
Now to stop myself from biasing my scoring too early in the song I would write whatever came to mind while listening and I will include that here: In the depths of the world a wandering jipsy passes by a rocky cliff face. He senses danger begins to run to escape something unseen. An ambush! His path is blocked so he turns around to run. Again an ambush. Running away montage. He hides inside a broken fortress but the depths of the place have a strange asortment of creatures. Are the creatures dangerous? He wonders as he walks cautiously by them. Perhaps they are, he escapes unnoticed to wander off again to a happier place.
Maybe that is of no use to you but that is a story I imagined by listening to this song.
Conclusion: Fantastic work 3rd in my list.