The bundle for [Extra 3] will cause the most overlap. From that point onwards, the majority of the songs in each patch were for Crusaders.

[Extra 2]
Alles Neu
Naraku no Hana
Sanpo
Streets of Gold
The Fear
Tsukematsukeru

These are all in the category in their final forms.

[Extra 3]
Fly on the Wall
Joyful
Move Your Feet
Whip It

These will be the only things you'll miss

[Extra 4]
Sleepyhead / Passion Pit
The Climb / Miley Cyrus
Uptown Girl / Billy Joel
Watercolour / Pendulum
Witchcraft / Pendulum
4” / Amaia Montero
A Fact of Life / Fact
Aegis / IT Medalion
All the Rowboats / Regina Spektor
Amaranth / Nightwish
Bad Girl Good Girl / Miss A
Boys and Girls / Pixie Lott
Can’t Nobody / 2NE1
Cherry Lips (Go Baby Go) / Garbage
E Raffaella e mia / Tiziano Ferro
Esclavo de Sus Besos / David Bisbal
Everybody (Backstreet’s Back) / Backstreet Boys
Fantastic Baby / Big Bang
Gangnam Style / Psy
Gentleman / Psy
Hitchin’ a Ride / Green Day
I Am the Best / 2NE1
Lights / Ellie Goulding
Love You Like a Love Song / Selena Gomez & the Scene
Lovumba / Daddy Yankee
Naturally / Selena Gomez & the Scene
Opposites Attract / Paula Abdul & the Wild Pair
Pop / La Oreja de Van Gogh
Princes of the Universe / Queen
Right Now / Psy
Shine / Collective Soul
Sobakasu
Stronger (What Doesn’t Kill You) / Kelly Clarkson
Torero / Chayanne
Touch
Waka Waka (Esto es Africa) / Shakira
Want U Back / Cher Lloyd
We Will Rock You / Queen
With You / Chris Brown
Yerbatero / Juanes
You Give Love a Bad Name / Bon Jovi

[Extra 5]
Applause
Bye Bye Beautiful
Call Me Maybe
Centerfold
International Love
Lithium
Little Red Rappinghood
Perfect Isn't Easy
Scream and Shout
Starry Eyed
Yuusei Overdose

[Extra 6]
Bass Down Low (feat. The Cataracs) / Dev
Battle Without Honor or Humanity / Tomayasu Hotei
Be Mine / Infinite
Boom Boom Pow / Black Eyed Peas
Feel This Moment (feat. Christina Aguilera) / Pitbull
I Think I'm Paranoid / Garbage
Only Happy When it Rains / Garbage
Setsuna Trip / Last Note. feat. GUMI
Bad End Night / Hitoshizuku x yama
Runaway / Houston
Candy Drop / SAYA
chaplet / DJ TOTTO
Guren no Homura / Gekidan Records feat. asami rio
Hero / Yurie Suzuki
Oboro / HHH x MM x ST
Snake Stick / DJ YOSHITAKA v.s. DJ Mad mass IZM

[Extra 7]
Back in Time / Pitbull
Beauty and a Beat / Justin Bieber
Burn / Ellie Goulding
Can't Hold Us (feat. Ray Dalton) / Macklemore & Ryan Lewis
Come & Get It / Selena Gomez
Domino / Jessie J.
Get Lucky (feat. Pharrell & Niles Rodgers) / Daft Punk
Just / Radiohead
Just Give Me a Reason (feat. Nate Ruess) / P!NK
Locked Out of Heaven / Bruno Mars
Lost One no Goukoku / Neru
My First Kiss (feat. KE$HA) / 3OH!3
Next to Me / Emeli Sande
On the Floor (feat. Pitbull) / Jennifer Lopez
Still Into You / Paramore
Stupid Girl / Garbage
Tainted Love / Soft Cell
Yie Ar Fan Club / MikitoP
Halcyon / Ellie Goulding
Hijo de la Luna / Mecano
EFFECT / mu-Ray-ZY
Insane Techniques (Radio Edit) / kors k
Kodomo live / onoken feat. asami
Legendary Dragon / Vivian
Lover's High / APHs
m1dy Deluxe / m1dy
Stray March / Yu_Tokiwa
Umeyukiyo / Qrispy Joybox feat. mao

[Extra 8]
Blurred Lines
Let it Go
My Songs Know What You Did in the Dark
Safe and Sound
The Way

All songs from [8], aside from Let it Go, have base files in [7].

Hopefully, this post helps you cherry pick which updates to get if you don't intend to get every song.