The subbass is there. A headphone with no subbass is basically any open headphone under $300. The HD598, DT880, MA900, Grado Prestige are all loved, and they have little subbass.
Of course a song without bass wouldn't sound great, but what would a song without mids sound like; or a song without treble? Bass is important obviously, but it is of least importance compared to its competition.
I think neither is "more " important, you cant dissect music that way, its the entire spectrum as accurately reproduced as possible, the trick is finding that mix that makes you happy, and obviously bass is lower on your pick list, understandable, because so much of the beauty of music is in the mid range, voices and many acoustic instruments, and who could live without cymbals and and the things that make music sparkle. The more tightly all these are integrated the better, and for me the Mikros is doing that for me. My Grado 325i's just don't have the low level detail like the ML's, and I have modified mine slightly trying to improve the bass / sub-bass and its very apparent that the driver can't handle those low notes and starts to break up, the bass gets mushy with no defined edges, just a mess.