Since I grew up in the 70's, I'd heard of "Portnoy's Complaint" quite a bit, as it was quite a controversial book at the time. Last fall, the phrase kept popping into my head as I read various things by and about Mike Portnoy. After a while, I stopped chuckling to myself every time. But it was a while, a long while.
I don't see how "playing the bass like a guitar" is necessarily a bad thing. Some of my favorite bass players are all over the bottom end, adding motion and tension and definitely doing much more than just thumping the root and the five. I guess when it actually gets to the point where they're playing countermelodies and counterpoints down there, you could compare what they're doing to what a guitarist does, but I still don't see how that's a bad thing if it's down with taste and restraint, which JM certainly has.
As for taking DT for granted, I completely agree with the original post. Back in the 80's, Rush started making a lot of music I really didn't care for, and in frustration, I referred to some of it as total shit. I told my friends that there was nothing going on, it was practically an insult to their talent that they were putting out this boring, by-the-numbers crap. They said "Are you kidding? Listen to what they're doing. Now imagine us in the garage creating music like this." Ouch. They were right. It really put it all into perspective. You get used to super-talented bands putting out masterpiece after masterpiece, and sometimes forget that the simplest stuff or the crappiest song they've ever done is still better than what most of us will ever create (which is rather annoying actually).