first, let me say...the NA is one of THE most difficult songs to sing in it's "most common" arrangement and key (which varies according to the singer.)
being able to slam dunk the traditional arrangement takes talent. One of the reason a lot of singers take liberty with the delivery is because they either A: think the original is boring and they want to put their own stamp on it...or B: they don't have the vocal discipline to cut it...so they put wavy "curly-q" overdone lines and "adaptations" in the song.
i cringe when i hear those new versions....only a few have pulled it off.. (live) although, some of the versions that were lip-scynched (jewel) were amazing...
"One POSSIBLE future. From your point of view... I don't know tech stuff.".... Kyle Reese