They should pull back any unnecessary parts of songs. One thing I do like about a lot of their earlier albums (even up to 8VM, sorta) is that the song always progressed.
SC and BC&SL (an album I don't like and an album I love) both have a bit of repetitiveness going on, even in some songs I love (Constant Motion, Repentance, A Nightmare to Remember, A Rite of Passage).
Then again, some songs I love keep progressing from those two albums (ITPOE, TDEN, TSF, TBOT, TCOT).
Length of an album doesn't bother me as much as filler does. And it's happened a bit since *VM, where it seemed OK because of their approach.