Floor's voice in the middle of that specific number - just her own voice with some reverb or someone harmonizing with her would work... if it's a Zappa "style" live work (which much of his stuff was) it's a framework to use...
Keys being a problem... hmm... would a hard Hammond B3 style work...?
Just listened back with headphones... surprising how different the mix sounds...
"T&T" - Floor's about balanced, bass is really leaping out (oh dear, let a bass-player control the mix
), guitar is spot-on - it would really suit a Hammond B3 sound...?
"DGMW" - where did the bass go...? keys sound better - drums are all a bit fluffy
"HGL" - the vocal effect might work if not quite so "effected" - a bit "easier" - drums and bass are as on "TGMW"
"SNS" - sorry Floor, he's definitely put too much up front (is that you on the bgv's? bring them up a bit), nice bass,
very nice guitar, drums are still fluffy, especially the snare.
All of them lack bass-drum definition...
Definitely listen to a mix on differing systems - definitely try a basic system in a vehicle at speed - I've said this to people before, many of us listen to music that way...
The further I go away from jokes about "front" and your "other(better) half", the safer I will be... the North Sea isn't enough distance...