John, I won't question the specifics of what you say, just the conclusion you draw from them.
I mean, yeah, even though the band live was a gas up until the very end, they probably did stay around too long, and yeah, the last few albums were a "mixed bag" (although I still think that Domino Theory is a damn good record), and yeah, Wayne's playing on those sides is "disengaged" more often than not (but there are exceptions, and live was another story altogether). So if that means that they "ultimately failed", so be it. I just find it hard to look at a band that made so many meaningful innovations and created so much great music as having "ultimately failed". Woodrow Wilson? Yeah. Weather Report, nah. I can't look at it like that. Too much of a lasting and meaningful (and still relevant, especially now that The Big Chill is finally starting to thaw and cats are getting over their fear of electronics and non-bebop derived rhythms) legacy to render that as the "final verdict", I think.