I can't find anything really missing (hence the full score) BUT I would like to mention few ideas since you obviously rock in this claustrophobic field. A one high note playing very quietly adds to that panicky feeling in these tracks. Also I was missing that sudden drumfill (PAdadaTSAH, you know) to add some drama.
Otherwise the song develops well, not too fast and not too slow so that the listener would get bored. You deserve a perfect score, keep it up! :)