I'll say for the Xth time that I really don't get the criticism of Mike's drumming. I just don't comprehend it. I mean, I get that it is more or less the same as what we've heard. But I mean I don't get it as a criticism. He's a drummer. The vast majority of drummers don't change or evolve their style much over time. And even when they do add some new things, due to the nature of the instrument, it often times isn't going to sound "new" even in those circumstances. Maybe I'm missing something, but it just seems to me that you either like Mike's drumming or you don't. And if you did and you've lost interest over time, then that's really not on him, and it just is what it is.
Think about it this way. Compare the following works of MP that are several years apart:
Train of Thought
BC&SL
Psychotic Symphony
You really won't hear much of a difference in the drumming in these albums. I would contend that almost all of MP's techniques in these albums, you would pretty much hear as variations of The Glass Prison and Blind Faith. And even for those two songs, you could already trace the style in Peruvian Skies and Trial of Tears.
Now let's compare for example with Mangini. Compare Elements of Persuasion and ADTOE. The snare and bass technique plus the lefty to righty shifts are retained but the difference in the orchestration is substantial. ADTOE is really MM's first time to showcase how he can support so many instruments at once.
But it doesn't stop there. Compare ADTOE with DT12. The difference again is susbstantial. You now hear for the first time those drum fills that use almost the whole kit. Then there are new polyrhythm combinations, most prominent in IT and Enigma Machine. And most important new technique is MM using two hi-hats or two rides at the same time, which are most prominent in TLG instrumental, in STR first stanza, and in the IT first stanza and chorus. He would incorporate that technique in The Astonishing and in the current IW&B tour, most noticeable in Take The Time.
But it still doesn't stop there. Compare DT12 with TA. SwingJazz blastebeats in Thee Days. Simultaneous snare rolls in Astonishing. Playing the ride with one hand while doing a melodic tom pattern with the other in Dystopian Overture. Then the whole The Walking Shadow. Those are things we haven't heard before.
I could do the same thing with Virgil Donati and Marco Minnemann. But the point is, Portnoy is a talented drummer but he really stopped growing with SDOIT. After that, he is just recombining old stuff. Still fun to play, but if you're a drummer, everything would really be familiar.