Because we talked about Bruce changing vocal lines recently:
This was pretty interesting. Not sure what the background for this gig was, if he was sick or something, but for the second half of the first chorus he changes the lines and stays low. So this is essentially a decades old tradition at this point
Edit: Okay, this show is actually fascinating. Go to 7:30-ish onwards to hear altered vocal lines for the prechorus in 2MTM.
I think I'll keep adding stuff to this comment, because it's actually pretty neat hearing a burnt out and possibly sick Bruce (5th night in a row in NYC) navigating such a challenging setlist. From 12:30-ish onwards we have The Trooper, which he sings almost exclusively low. Instead of the constant B4s he centers the melodies around the root note and the D below (which he also does on the "and as we race towards the human wall" on multiple live albums, here he does that for the majority of verses). Funnily enough this would've been a way for Blaze to get consistently and rather easily through this song.
16:50 (time stamps are always around the start of the vocals, not the song) sees Revelations with altered and lowered vocal lines. It's even more noticeable in the other verses. All the audience interaction inbetween is missing as well (the "New York, can you feel it?" shouts and so on).
After Losfer Words we get Flight Of Icarus, where Bruce around 27:05 starts an altered verse (he tries for some of the higher notes, but ends up abandoning them). He also gets the lyrics wrong, by singing the second half of the second verse during the first verse.
If you wanna hear a version of Rime without soaring vocals go to 31:40 onwards. I'm a baritone with a horrible high range, but I'd probably be able to get through the entire song with those vocal lines, which is actually kinda neat. On this one you can hear that this was mostly improvised, because there are plenty of parts where Bruce could've adjusted some of the notes by a step higher or lower and it would've fit perfectly with the harmony of the song. Instead he sang against the harmonic structure at multiple parts. Not the most pleasant experience.
Oof, poor Bruce. The ending of the song (42:45) is particularly rough for him. Powerslave right afterwards has very few changes compared to the previous songs, but you can hear how Bruce is struggling. This show must've been hell for him.