Hi man,

Its sounding acceptable, but it can improve.
You basicly are doing the most difficult part, which is getting the middle-high content working, but messing up a bit a on the more basic things, in my opinion, already in order of relevance:

1 - Timing, specially on the low parts, LOCK into the beat, you are letting too many phrases wander around, it ends up sounding loose against the backing track, for example on around 1:40 (I can remember, the promise I made so deep). Notice that you are changing the whole idea of the phrase even including notes that are not on the original line;

2 - You are using very gentle attacks way too often, basicly you attack it on a gentle crescendo, and it takes away the power. Specially when it gets to the chorus, try to imagine the note with the desired intensity right away, and attack it more directly (also on the beat), it will sound more powerful for virtually no cost in terms of stamina or different techniques;

3 - Vocals are a tad too loud against the song, turn them down just a notch so that they blend better;

4 - On very few spots the choices you are doing in interpretation are not so great, for example, on End of This Chapter, at 3:20 "All the things AH could never", that switch in that point is not cool, aim more for UH and increase the intensity to make sure you dont let the quality change;

5 - A bit more of forward placement on the rounded notes, for example on 4:20, would make it sound more natural.

Hope it helps somehow, 1 and 2 in special would really bring the song to life.