I like Song Cycle, it's Gonzo Amphetamine Pop in the extreme. I don't expect other people to, because...it's Gonzo Amphetamine Pop in the extreme.
Is it too clever, yes, of course it is. But could anybody else have done it? Not ever close. Not sure where clever crosses over into genuine eccentricity, but I think he might be on that other side. Sometimes, anyway.
Besides, he got Smile finished for real where Brian couldn't, and that in itself earns all forgiveness (or at least most forgiveness). Brian did/does not have the skill set to put that whole thing together like Van Dyke did. Nor does/did he need to. Just saying, though, no Van Dyke, no finished Smile. Just a lot of unshaped brilliance with a lot of shape but no form.
Tell you what - if you ever have the right moment, sit down with an age appropriate crowd and watch Follow That Bird, he wrote some gorgeous songs and score on that movie.
All that aside, if this isn't a hoot, what is?