I think it is in general important to retain the operations of harmony in music.
This pushes my harmony/melody/rhythm button: harmony--things sounding at the same time/melody--sounds going "higher" and "lower"/rhythm--things happening in time.
While I agree (without at all being sure that it's any more than a personal desire to have more of it) that acousmatic's heyday is yet to come, I also recognize that there are also a lot of fine things being done in soundscape and in eai. And I more than suspect that it's in more open practices that the future of elecroacoustic will be. But that's because what I think is that the heyday of experimental (in the old sense) music is yet to come!!