I would agree that most people seem indifferent about it but like you said once its been on solidly over a weekend or so it'll seriously grow - it seems too easy to listen to all the intros and think "hmm no Outshined or Wake Up riffs here then".
I definitely wouldnt put it up there with Superunknown though - thats a complete album in the line of the greats. Every song sounds different but maintains a theme, Audioslave is a bit more "samey" once you get away from the 6 or 7 main tracks, I think anyway.
Your selection of songs are my favs too including Like A Stone though, on the whole Id totally agree - too many people overlook it as a watered down "supergroup" (stupid word) but I reckon the chorus' are way above most things out there at the moment.