What I make out of it is that he means the bass loses midbass (punchiness) and and gets more subbass skewed and to him the subbass starts to affect the low mids so they don't sound equally clear. Several people seems to agree it seems to make the bass deeper sounding as a trade-off in lost midbass.
Thanks! Even after falling asleep in a chair at work (after I clocked out), and still feeling pretty bleary now that I made it home, what you said makes perfect sense to me.
What is the "softie" mod? Is that the ring of stuffing Miceblue and others were doing to their pads last year?