It's all relative, right? I remember being a bit sideways about Billy Breathes, but I think it's held up super well for the Phish fan. Of course they were still a "new" band, in their prime, but I was, and still am, always (stupidly) suspicious of newer albums for older, established bands. I was scarred by Built to Last by the Dead, Steel Wheels by the Stones, and a handful of other disasters. I just didn't know enough about Phish at the time.
I like a number of songs from Joy, like Light, Backwards, but I think pecorino is on to something. Blaze On is a "cheap" song, as in, I could probably write that. And I'm not kidding, and I know very little about music. The boys have a few of these songs that are blah, especially in the last few years of newer songs.
I'll add that just because you can turn a song into a jam doesn't mean A) it's a good song and B) the jam amounts to anything. At least for me, I'd like to be able to drop in on a song halfway through and know what song/jam it is. Phish has jams that probably shouldn't be, never mind the songs. But I'm the 50 year old guy that wants a long Tweezer, a jammy 2001, PYITE, Antelope and/or YEM. And I'm down with their covers. Crosseyed and Painless and Loving Cup rival their original counterparts, IMO.
Rock on dudes. And get off my lawn.