I get that, but a lot of the "classics" that have shown up tour after tour have been selections from Image & Words, Awake, and Scenes From A Memory, all of which have been celebrated (in one way or the other) on recent tours, and can be safely avoided for the near future.
Therefore, I think they could totally get away with a tour of at least MOSTLY MM-era songs. Maybe sprinkle in one or two tunes from Train of Thought, Six Degrees of Inner Turbulence, or maybe Falling Into Infinity and call it a day.