Well, it might be that I'm wrong, I don't have the truth in my pocket. The fact is that Oasis had everything in their hands to be a great band. But they kinda didn't make that. But my point mainly is this: U2 gave us music we never heard, Pearl Jam, Bruce Springsteen, gave us music we never heard, though their influences. I don't see Oasis did the same. They were on a good way, but they didn't go forward. You will remember Oasis for what they've done in the past,but not for what they're doing now. Maybe their ever best record has still to be written, but in the moment, I don't put them at the same level of Pearl Jam (because they almost started in the same periods)
You should listen to their new album, its a real change for them.