For my money, the only song from IT that doesn't suffer from key changes is Land of Con
What really surprised me was that there was nothing from Supper's Ready. Nic appeared to confirm that Apocalypse onwards had made the cut in several interviews, but now it appears that it was dropped quite early in rehearsals.
I'm not surprised. I recall having a recording from radio of them doing those sections after In the Cage on the IT tour and Phil struggled with the vocals (in 9/8 as I recall), which I suspect is why when I saw them we got In that Cage->Quiet Earth ->Afterglow.
I'm not sure how far they'd have to drop the key, but it'd be significant.