I like Bloodshy & Avant a lot too, but I still don't like Nu-Di-Ty
I'd rank X a lot better than Body Language, but it's just not as good as Fever.
I do have some gripes about Fever too: There's one track I have issues with. it's "Dancefloor" , I think the lyrics are too rhyme-y & the whole song is a bit blah compared to the rest of Fever.
gonna lose it to the music - got my body gonna use it 
My ideal Fever would have the brilliant "Good Like That" instead of the dull "Dancefloor", tho they're both on the japanese Hyper Edition so whatevs
My ideal X tracklist:
1. Like A Drug [4th & last single]
2. In My Arms [1st single]
3. Speakerphone
4. When The Cats Away (leaked demo)
5. Heart Beat Rock
6. The One [club single]
7. No More Rain
8. All I See
9. Stars [3rd single]
10. Wow [2nd single]
11. Feels So Good (leaked demo)
12. Cosmic
13. King & Queen (hidden track since the song is so short.)
Magnetic Electric & Ripping Up The Disco would be both downloadable with the cd, screw iTunes. I didn't want to add them to the tracklist just to keep it a bit more realistic.
I'd like to see Excuse My French too, but I sorta understand why Kylie & co keep denying the song even exists since people would think the song is about her french ex-boyfriend and unlike so many other artists Kylie doesn't make her private life in to a spectacle just to entertaint the masses ...
Kylie having a hidden track isn't completely out of the question, Dannii had a hidden track on Girl (Coconut) & on Neon Nights (Come & Get It remix).
I also picked out the singles. Club single would be just a maxi-cd with remixes & no music video. Speakerphone might also be 2nd club single.
I'm curious to hear if anyone else has a realistic vision of how X should have ideally been?