Because I've got a bit of time
and I'm definitely not procrastinating I decided to go through the reunion songs and see what key they're in
In the case of many key changes I'll go for the main key.
Brave New World:
TWM: E minor
GOTN: D minor
BNW: D minor
BB: E minor
TM: E minor
DOM: A minor
TFA: E minor
TN: E phrygian
OOTSP: E minor
TTLBLH: F# minor
Dance Of Death:
WD: E mixolydian (G mixolydian in the pre chorus, A mixolydian in the chorus)
R: D minor
NML: A minor
M: E minor
DOD: E minor / E dorian
GOT: G mixolydian / G minor
TNF: D minor (with strong A mixolydian tendencies in the verses)
P: E minor
FITS: E minor
AOI: E minor with a lot of sharp 6s (think the James Bond theme)
J: A minor (Modal mixture in the verses, flipping between A minor and A major)
A Matter Of Life And Death:
DW: E minor
TCDR: E minor
BTATS: E minor
TP: E minor
TLD: E minor
OOTS: E minor (with a bit of dorian here and there)
TROBB: E minor / E phrygian
FTGGOG: E minor
LOL (lol): E minor
TL: D minor (finally something else
)
The Final Frontier:
S15: Based around the E note, with tons of tritones giving it almost a locrian feel.
TFF: E minor
ED: E minor / E blues
MOM: D minor
CH: E minor
TA: A minor, D mixolydian verses, D minor in the Magus part, E minor right after
IOA: E mixolydian flat 6, A mixolydian flat 6 in the verses. E minor and phrygian in the "fertility Mother Goddess" part. Stepwise descending motions afterwards.
S: E minor
TT: D minor
TMWWBK: A minor, E minor, E mixolydian
WTWWB: E minor
The Book Of Souls:
IESF: D minor
SOL: G minor / G blues. An absolute clusterfuck of a song, not gonna go further into the keys here lol
TGU: E minor
TRATB: E phrygian, E minor + modal mixture E minor / major
WTRRD: E minor
TBOS: E minor / E phrygian
DOG: B minor / E minor
SOTV: E minor
TOAC: A minor
TMOS: C minor (!)
EOTC: E minor
Senjutsu:
S: E phrygian
S (lol): E minor with some tritones for variety
TWOTW: D minor / D dorian
LIALW: E minor
DOFP: E minor
TTM: D minor
DH: E (harmonic) minor
DOTC: A minor-ish, some mixolydian
TP: D minor / phrygian, E minor / phrygian
HOE: E minor
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So a good 2/3rds of the songs since the reunion are written in some kind of E. The worst offender is AMOLAD, where almost the whole album is in E minor. A few of the songs have key changes in the mid sections and songs like BTATS play around with time signatures, so it's not as monotonous while listening as it seems on paper. I'm not motivated enough to go and look through the time signatures though lol
We've got 4/4, 3/4, 6/8, 7/8 and 12/8 throughout the songs. There might be a couple of other ones, but I don't remember them all.