the Roller simply isn't that good and there's a reason it never appeared on an Oasis album.
think about it.
And I think another reason TR didn't make it onto an Oasis, was because Noel really did think it could be better.
When people were stating why they thought TR should have been released by Oasis, they kept stating that TR was better than the worst songs on DOYS. But I think the point that people were missing was that Noel didn't want TR to better than the worst stuff on a particular album. He wanted TR to be one of the best tracks on an album.
When Noel was talking about hearing most of the stuff on DGSS he made a point of saying that he thought that TR would/could have been a big song for Oasis, but they never could get it there. I think the reason that TR didn't make it onto an Oasis album was because Noel didn't just feel that TR could be better, but that it could be great. That it would make no sense to put as just an album track ON any album, when it clearly could be better, and if made better, be mega.
So when people say that TR is better than TNOR, AGN, or HHL, I don't think the intent was for TR to just be better than those songs, but rather for it to be just as good if not better than say TT or BIU (which I don't think it is). Noel wanted to make TR into a monster hit, not just a pretty good song. And I think TR would have stayed hidden if it didn't make it to point where Noel thought it had the potential to be.
Beady Eye released it because it was closes thing they had to an actual single other FLW. So they clearly couldn't afford to keep developing it until it became what Noel felt it could have become. The Roller was released by necessity. If Oasis had stayed together, we probably would have never heard TR. At least not until it developed into what it had the potential to become. And that's what I find kind of sad, because wasted (not saying that TR is a complete waste) potential is the worst thing to see/hear.
So it would have been nice if Oasis would have stayed together, or if Beady Eye would have had more of an opportunity to develop it into the song that it could have been.