I think that MM performance is too much analysed under microscope here. I know, I know, THIS is the place for that, but...
Let's see... hypothetically if Marco Minnemann (that personally I think it's the greatest rock drummer nowadays) was the DT drummer and Steven Wilson's last album was a DT album (?!), I guess many people here would judging his performance generic or with lack of inspiration (which of course I don't think so). And I'm saying that (maybe it's a wrong perception), because on that album thread, although many are praising the album, I didn't see any comments about the drumming on it.
The point is: I think, in general way, with DT, the expectations are enormously high and it is very difficulty to the band to satisfy that, even more to MM (and, if it was the case, to Marco Minneman, Gavin Harrison etc) that will always be the substitute for a drum legend.
Another interesting thing is that the "MM's defenders" almost always defend him explaining "why" his drumming is so cool. And, although I'm a drummer too (of very basic level), I appreciate his drumming with no mathematical analisys. In songs like Bridges in the sky, Lost Not Forgotten, The enemy inside, The looking glass (my personal favorite of all), or in parts of Surrender to reason (solo section), Behind the Veil (the first third), Outcry (solo section), Breaking All Illusions (soft solo section) I heard the drumming and just "feel" - wow, this is very cool! However, I do agree that MM is still in need for a really good drum sound on DT albuns and maybe this is not helping to a better appreciation of his work.